238660128 has 96 divisors (see below), whose sum is σ = 795553920. Its totient is φ = 68186880.

The previous prime is 238660117. The next prime is 238660129. The reversal of 238660128 is 821066832.

238660128 is a `hidden beast` number, since 23 + 8 + 6 + 601 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 238660092 and 238660101.

It is not an unprimeable number, because it can be changed into a prime (238660129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13683 + ... + 25778.

It is an arithmetic number, because the mean of its divisors is an integer number (8287020).

Almost surely, 2^238660128 is an apocalyptic number.

238660128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

238660128 is an abundant number, since it is smaller than the sum of its proper divisors (556893792).

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

238660128 is a wasteful number, since it uses less digits than its factorization.

238660128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39487 (or 39473 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 238660128 is about 15448.6286770056. The cubic root of 238660128 is about 620.2878718675.

The spelling of 238660128 in words is "two hundred thirty-eight million, six hundred sixty thousand, one hundred twenty-eight".