464643640 has 64 divisors (see below), whose sum is σ = 1060869600. Its totient is φ = 183140352.

The previous prime is 464643629. The next prime is 464643659. The reversal of 464643640 is 46346464.

It is a self number, because there is not a number n which added to its sum of digits gives 464643640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1072864 + ... + 1073296.

Almost surely, 2^464643640 is an apocalyptic number.

464643640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

464643640 is an abundant number, since it is smaller than the sum of its proper divisors (596225960).

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

464643640 is a wasteful number, since it uses less digits than its factorization.

464643640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 37.

The square root of 464643640 is about 21555.5941694958. The cubic root of 464643640 is about 774.5331298379.

The spelling of 464643640 in words is "four hundred sixty-four million, six hundred forty-three thousand, six hundred forty".