73638464 has 28 divisors (see below), whose sum is σ = 146442684. Its totient is φ = 36739584.

The previous prime is 73638463. The next prime is 73638469. The reversal of 73638464 is 46483637.

It can be written as a sum of positive squares in 2 ways, for example, as 16000000 + 57638464 = 4000^2 + 7592^2 .

It is not an unprimeable number, because it can be changed into a prime (73638463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38294 + ... + 40170.

Almost surely, 2^73638464 is an apocalyptic number.

It is an amenable number.

73638464 is a deficient number, since it is larger than the sum of its proper divisors (72804220).

73638464 is a wasteful number, since it uses less digits than its factorization.

73638464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502 (or 2492 counting only the distinct ones).

The product of its digits is 290304, while the sum is 41.

The square root of 73638464 is about 8581.2856845580. The cubic root of 73638464 is about 419.1488127776.

The spelling of 73638464 in words is "seventy-three million, six hundred thirty-eight thousand, four hundred sixty-four".