30872540 has 24 divisors (see below), whose sum is σ = 65032800. Its totient is φ = 12310848.

The previous prime is 30872537. The next prime is 30872563. The reversal of 30872540 is 4527803.

It is a happy number.

It is a super-2 number, since 2×30872540² = 1906227452103200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4769 + ... + 9191.

It is an arithmetic number, because the mean of its divisors is an integer number (2709700).

Almost surely, 2^30872540 is an apocalyptic number.

It is an amenable number.

30872540 is an abundant number, since it is smaller than the sum of its proper divisors (34160260).

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

30872540 is a wasteful number, since it uses less digits than its factorization.

30872540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781 (or 4779 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 30872540 is about 5556.3063270486. The cubic root of 30872540 is about 313.7069357782.

The spelling of 30872540 in words is "thirty million, eight hundred seventy-two thousand, five hundred forty".