30872420 has 24 divisors (see below), whose sum is σ = 66213504. Its totient is φ = 12085856.

The previous prime is 30872419. The next prime is 30872437. The reversal of 30872420 is 2427803.

It is a self number, because there is not a number n which added to its sum of digits gives 30872420.

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 7 ways as a sum of consecutive naturals, for example, 15482 + ... + 17361.

It is an arithmetic number, because the mean of its divisors is an integer number (2758896).

Almost surely, 2^30872420 is an apocalyptic number.

It is an amenable number.

30872420 is an abundant number, since it is smaller than the sum of its proper divisors (35341084).

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

30872420 is a wasteful number, since it uses less digits than its factorization.

30872420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32899 (or 32897 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 30872420 is about 5556.2955284974. The cubic root of 30872420 is about 313.7065293233.

The spelling of 30872420 in words is "thirty million, eight hundred seventy-two thousand, four hundred twenty".