238455816 has 64 divisors (see below), whose sum is σ = 619315200. Its totient is φ = 76454208.

The previous prime is 238455799. The next prime is 238455827. The reversal of 238455816 is 618554832.

It is a super-2 number, since 2×238455816² = 113722352368451712, 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 15 ways as a sum of consecutive naturals, for example, 64761 + ... + 68343.

It is an arithmetic number, because the mean of its divisors is an integer number (9676800).

Almost surely, 2^238455816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238455816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309657600).

238455816 is an abundant number, since it is smaller than the sum of its proper divisors (380859384).

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

238455816 is a wasteful number, since it uses less digits than its factorization.

238455816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3698 (or 3694 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 238455816 is about 15442.0146354030. The cubic root of 238455816 is about 620.1108161268.

The spelling of 238455816 in words is "two hundred thirty-eight million, four hundred fifty-five thousand, eight hundred sixteen".