64493632 has 56 divisors (see below), whose sum is σ = 147035520. Its totient is φ = 27494400.

The previous prime is 64493629. The next prime is 64493659. The reversal of 64493632 is 23639446.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 64493591 and 64493600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160632 + ... + 161032.

Almost surely, 2^64493632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64493632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73517760).

64493632 is an abundant number, since it is smaller than the sum of its proper divisors (82541888).

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

64493632 is a wasteful number, since it uses less digits than its factorization.

64493632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779 (or 769 counting only the distinct ones).

The product of its digits is 93312, while the sum is 37.

The square root of 64493632 is about 8030.7927379556. The cubic root of 64493632 is about 401.0257672553.

The spelling of 64493632 in words is "sixty-four million, four hundred ninety-three thousand, six hundred thirty-two".