238395664 has 20 divisors (see below), whose sum is σ = 497422156. Its totient is φ = 110028672.

The previous prime is 238395613. The next prime is 238395683. The reversal of 238395664 is 466593832.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 81144064 + 157251600 = 9008^2 + 12540^2 .

It is a super-2 number, since 2×238395664² = 113664985228001792, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572859 + ... + 573274.

Almost surely, 2^238395664 is an apocalyptic number.

It is an amenable number.

238395664 is an abundant number, since it is smaller than the sum of its proper divisors (259026492).

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

238395664 is a wasteful number, since it uses less digits than its factorization.

238395664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146154 (or 1146148 counting only the distinct ones).

The product of its digits is 933120, while the sum is 46.

The square root of 238395664 is about 15440.0668392336. The cubic root of 238395664 is about 620.0586694394.

The spelling of 238395664 in words is "two hundred thirty-eight million, three hundred ninety-five thousand, six hundred sixty-four".