64400932 has 12 divisors (see below), whose sum is σ = 112758156. Its totient is φ = 32184320.

The previous prime is 64400923. The next prime is 64400939. The reversal of 64400932 is 23900446.

It can be written as a sum of positive squares in 2 ways, for example, as 35928036 + 28472896 = 5994^2 + 5336^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64400932.

It is not an unprimeable number, because it can be changed into a prime (64400939) 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, 12132 + ... + 16612.

It is an arithmetic number, because the mean of its divisors is an integer number (9396513).

Almost surely, 2^64400932 is an apocalyptic number.

It is an amenable number.

64400932 is a deficient number, since it is larger than the sum of its proper divisors (48357224).

64400932 is a wasteful number, since it uses less digits than its factorization.

64400932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8078 (or 8076 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 64400932 is about 8025.0191277031. The cubic root of 64400932 is about 400.8335368343.

The spelling of 64400932 in words is "sixty-four million, four hundred thousand, nine hundred thirty-two".