238428920 has 16 divisors (see below), whose sum is σ = 536465160. Its totient is φ = 95371552.

The previous prime is 238428917. The next prime is 238428941. The reversal of 238428920 is 29824832.

238428920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2980322 + ... + 2980401.

Almost surely, 2^238428920 is an apocalyptic number.

238428920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

238428920 is an abundant number, since it is smaller than the sum of its proper divisors (298036240).

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

238428920 is a wasteful number, since it uses less digits than its factorization.

238428920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5960734 (or 5960730 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 238428920 is about 15441.1437400213. The cubic root of 238428920 is about 620.0875006577.

The spelling of 238428920 in words is "two hundred thirty-eight million, four hundred twenty-eight thousand, nine hundred twenty".