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30008980 = 22519157503
BaseRepresentation
bin111001001111…
…0011010010100
32002110121120201
41302132122110
530140241410
62551110244
7513033511
oct162363224
962417521
1030008980
1115a37211
12a072384
1362a90c1
143db2308
15297b83a
hex1c9e694

30008980 has 48 divisors (see below), whose sum is σ = 66890880. Its totient is φ = 11276928.

The previous prime is 30008977. The next prime is 30008989. The reversal of 30008980 is 8980003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30008989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59409 + ... + 59911.

It is an arithmetic number, because the mean of its divisors is an integer number (1393560).

Almost surely, 230008980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30008980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33445440).

30008980 is an abundant number, since it is smaller than the sum of its proper divisors (36881900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30008980 is a wasteful number, since it uses less digits than its factorization.

30008980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 30008980 is about 5478.0452718100. The cubic root of 30008980 is about 310.7542507779.

Adding to 30008980 its reverse (8980003), we get a palindrome (38988983).

The spelling of 30008980 in words is "thirty million, eight thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 19 20 38 76 95 157 190 314 380 503 628 785 1006 1570 2012 2515 2983 3140 5030 5966 9557 10060 11932 14915 19114 29830 38228 47785 59660 78971 95570 157942 191140 315884 394855 789710 1500449 1579420 3000898 6001796 7502245 15004490 30008980