308871972 has 36 divisors (see below), whose sum is σ = 805948416. Its totient is φ = 99635760.

The previous prime is 308871911. The next prime is 308872007. The reversal of 308871972 is 279178803.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137268 + ... + 139499.

It is an arithmetic number, because the mean of its divisors is an integer number (22387456).

Almost surely, 2^308871972 is an apocalyptic number.

It is an amenable number.

308871972 is an abundant number, since it is smaller than the sum of its proper divisors (497076444).

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

308871972 is a wasteful number, since it uses less digits than its factorization.

308871972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276808 (or 276803 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 308871972 is about 17574.7538247339. The cubic root of 308871972 is about 675.9680464104.

The spelling of 308871972 in words is "three hundred eight million, eight hundred seventy-one thousand, nine hundred seventy-two".