641397384 has 48 divisors (see below), whose sum is σ = 1739875020. Its totient is φ = 213459840.

The previous prime is 641397373. The next prime is 641397397. The reversal of 641397384 is 483793146.

It can be written as a sum of positive squares in 2 ways, for example, as 601328484 + 40068900 = 24522^2 + 6330^2 .

It is a super-2 number, since 2×641397384² = 822781208404086912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40854 + ... + 54330.

Almost surely, 2^641397384 is an apocalyptic number.

It is an amenable number.

641397384 is an abundant number, since it is smaller than the sum of its proper divisors (1098477636).

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

641397384 is a wasteful number, since it uses less digits than its factorization.

641397384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14150 (or 14143 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 641397384 is about 25325.8244485742. The cubic root of 641397384 is about 862.4006227027.

The spelling of 641397384 in words is "six hundred forty-one million, three hundred ninety-seven thousand, three hundred eighty-four".