320638734 has 48 divisors (see below), whose sum is σ = 792176112. Its totient is φ = 92853504.

The previous prime is 320638727. The next prime is 320638763. The reversal of 320638734 is 437836023.

It is a super-2 number, since 2×320638734² = 205618395482245512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36324 + ... + 44279.

It is an arithmetic number, because the mean of its divisors is an integer number (16503669).

Almost surely, 2^320638734 is an apocalyptic number.

320638734 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

320638734 is an abundant number, since it is smaller than the sum of its proper divisors (471537378).

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

320638734 is a wasteful number, since it uses less digits than its factorization.

320638734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80641 (or 80638 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 320638734 is about 17906.3880780017. The cubic root of 320638734 is about 684.4451677852.

The spelling of 320638734 in words is "three hundred twenty million, six hundred thirty-eight thousand, seven hundred thirty-four".