30858972 has 12 divisors (see below), whose sum is σ = 72004296. Its totient is φ = 10286320.

The previous prime is 30858953. The next prime is 30858979. The reversal of 30858972 is 27985803.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30858979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285779 + ... + 1285802.

It is an arithmetic number, because the mean of its divisors is an integer number (6000358).

Almost surely, 2^30858972 is an apocalyptic number.

It is an amenable number.

30858972 is an abundant number, since it is smaller than the sum of its proper divisors (41145324).

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

30858972 is a wasteful number, since it uses less digits than its factorization.

30858972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571588 (or 2571586 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 30858972 is about 5555.0852378699. The cubic root of 30858972 is about 313.6609726084.

The spelling of 30858972 in words is "thirty million, eight hundred fifty-eight thousand, nine hundred seventy-two".