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30578980 = 2251980471
BaseRepresentation
bin111010010100…
…1100100100100
32010112120110211
41310221210210
530312011410
63011225204
7520626355
oct164514444
963476424
1030578980
1116296493
12a2a8204
136448693
1440bdd2c
152a4068a
hex1d29924

30578980 has 24 divisors (see below), whose sum is σ = 67596480. Its totient is φ = 11587680.

The previous prime is 30578957. The next prime is 30578981. The reversal of 30578980 is 8987503.

It is not an unprimeable number, because it can be changed into a prime (30578981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39856 + ... + 40615.

It is an arithmetic number, because the mean of its divisors is an integer number (2816520).

Almost surely, 230578980 is an apocalyptic number.

It is an amenable number.

30578980 is an abundant number, since it is smaller than the sum of its proper divisors (37017500).

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

30578980 is a wasteful number, since it uses less digits than its factorization.

30578980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80499 (or 80497 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 30578980 is about 5529.8263987218. The cubic root of 30578980 is about 312.7094446607.

The spelling of 30578980 in words is "thirty million, five hundred seventy-eight thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 19 20 38 76 95 190 380 80471 160942 321884 402355 804710 1528949 1609420 3057898 6115796 7644745 15289490 30578980