64891232 has 96 divisors (see below), whose sum is σ = 156441600. Its totient is φ = 25878528.

The previous prime is 64891223. The next prime is 64891249. The reversal of 64891232 is 23219846.

64891232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 64891192 and 64891201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336128 + ... + 336320.

It is an arithmetic number, because the mean of its divisors is an integer number (1629600).

Almost surely, 2^64891232 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 64891232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78220800).

64891232 is an abundant number, since it is smaller than the sum of its proper divisors (91550368).

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

64891232 is a wasteful number, since it uses less digits than its factorization.

64891232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 300 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 64891232 is about 8055.5094190250. The cubic root of 64891232 is about 401.8481807511.

The spelling of 64891232 in words is "sixty-four million, eight hundred ninety-one thousand, two hundred thirty-two".