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30542880 = 25351719197
BaseRepresentation
bin111010010000…
…0110000100000
32010110201221210
41310200300200
530304333010
63010350120
7520416204
oct164406040
963421853
1030542880
1116271355
12a28b340
136435114
1440b0b04
152a34b20
hex1d20c20

30542880 has 192 divisors, whose sum is σ = 107775360. Its totient is φ = 7225344.

The previous prime is 30542867. The next prime is 30542927. The reversal of 30542880 is 8824503.

30542880 is nontrivially palindromic in base 14.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154942 + ... + 155138.

It is an arithmetic number, because the mean of its divisors is an integer number (561330).

Almost surely, 230542880 is an apocalyptic number.

30542880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30542880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53887680).

30542880 is an abundant number, since it is smaller than the sum of its proper divisors (77232480).

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

30542880 is a wasteful number, since it uses less digits than its factorization.

30542880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 30542880 is about 5526.5613178540. The cubic root of 30542880 is about 312.5863398765.

The spelling of 30542880 in words is "thirty million, five hundred forty-two thousand, eight hundred eighty".