64405832 has 8 divisors (see below), whose sum is σ = 120760950. Its totient is φ = 32202912.

The previous prime is 64405771. The next prime is 64405853. The reversal of 64405832 is 23850446.

It can be written as a sum of positive squares in only one way, i.e., 63457156 + 948676 = 7966^2 + 974^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×64405832² = 8296222391224448, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4025357 + ... + 4025372.

Almost surely, 2^64405832 is an apocalyptic number.

It is an amenable number.

64405832 is a deficient number, since it is larger than the sum of its proper divisors (56355118).

64405832 is a wasteful number, since it uses less digits than its factorization.

64405832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050735 (or 8050731 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 64405832 is about 8025.3244171186. The cubic root of 64405832 is about 400.8437024974.

The spelling of 64405832 in words is "sixty-four million, four hundred five thousand, eight hundred thirty-two".