30861072 has 60 divisors (see below), whose sum is σ = 94224624. Its totient is φ = 9351360.

The previous prime is 30861067. The next prime is 30861097. The reversal of 30861072 is 27016803.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 8158 + ... + 11325.

Almost surely, 2^30861072 is an apocalyptic number.

It is an amenable number.

30861072 is an abundant number, since it is smaller than the sum of its proper divisors (63363552).

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

30861072 is a wasteful number, since it uses less digits than its factorization.

30861072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19508 (or 19499 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 30861072 is about 5555.2742506559. The cubic root of 30861072 is about 313.6680874825.

Adding to 30861072 its reverse (27016803), we get a palindrome (57877875).

The spelling of 30861072 in words is "thirty million, eight hundred sixty-one thousand, seventy-two".