238305928 has 32 divisors (see below), whose sum is σ = 527132160. Its totient is φ = 98835840.

The previous prime is 238305917. The next prime is 238305941. The reversal of 238305928 is 829503832.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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, 66901 + ... + 70372.

It is an arithmetic number, because the mean of its divisors is an integer number (16472880).

Almost surely, 2^238305928 is an apocalyptic number.

238305928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

238305928 is an abundant number, since it is smaller than the sum of its proper divisors (288826232).

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

238305928 is a wasteful number, since it uses less digits than its factorization.

238305928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137317 (or 137313 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 238305928 is about 15437.1606197513. The cubic root of 238305928 is about 619.9808596242.

The spelling of 238305928 in words is "two hundred thirty-eight million, three hundred five thousand, nine hundred twenty-eight".