461505640 has 16 divisors (see below), whose sum is σ = 1038387780. Its totient is φ = 184602240.

The previous prime is 461505637. The next prime is 461505677. The reversal of 461505640 is 46505164.

It can be written as a sum of positive squares in 2 ways, for example, as 429898756 + 31606884 = 20734^2 + 5622^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5768781 + ... + 5768860.

Almost surely, 2^461505640 is an apocalyptic number.

461505640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

461505640 is an abundant number, since it is smaller than the sum of its proper divisors (576882140).

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

461505640 is a wasteful number, since it uses less digits than its factorization.

461505640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11537652 (or 11537648 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 461505640 is about 21482.6823278659. The cubic root of 461505640 is about 772.7855704533.

The spelling of 461505640 in words is "four hundred sixty-one million, five hundred five thousand, six hundred forty".