305638972 has 12 divisors (see below), whose sum is σ = 537205480. Its totient is φ = 152151696.

The previous prime is 305638961. The next prime is 305638987. The reversal of 305638972 is 279836503.

305638972 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165918 + ... + 167749.

Almost surely, 2^305638972 is an apocalyptic number.

It is an amenable number.

305638972 is a deficient number, since it is larger than the sum of its proper divisors (231566508).

305638972 is a wasteful number, since it uses less digits than its factorization.

305638972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333900 (or 333898 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 305638972 is about 17482.5333404515. The cubic root of 305638972 is about 673.6012898374.

The spelling of 305638972 in words is "three hundred five million, six hundred thirty-eight thousand, nine hundred seventy-two".