816704238 has 32 divisors (see below), whose sum is σ = 1926973440. Its totient is φ = 225816480.

The previous prime is 816704237. The next prime is 816704257. The reversal of 816704238 is 832407618.

It is a junction number, because it is equal to n+sod(n) for n = 816704196 and 816704205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816704237) 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, 312333 + ... + 314936.

It is an arithmetic number, because the mean of its divisors is an integer number (60217920).

Almost surely, 2^816704238 is an apocalyptic number.

816704238 is an abundant number, since it is smaller than the sum of its proper divisors (1110269202).

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

816704238 is a wasteful number, since it uses less digits than its factorization.

816704238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627312.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 816704238 is about 28578.0376863073. The cubic root of 816704238 is about 934.7344944705.

The spelling of 816704238 in words is "eight hundred sixteen million, seven hundred four thousand, two hundred thirty-eight".