64457328 has 80 divisors (see below), whose sum is σ = 182800800. Its totient is φ = 19448832.

The previous prime is 64457299. The next prime is 64457333. The reversal of 64457328 is 82375446.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32098 + ... + 34046.

It is an arithmetic number, because the mean of its divisors is an integer number (2285010).

Almost surely, 2^64457328 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 64457328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91400400).

64457328 is an abundant number, since it is smaller than the sum of its proper divisors (118343472).

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

64457328 is a wasteful number, since it uses less digits than its factorization.

64457328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026 (or 2020 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 64457328 is about 8028.5321198834. The cubic root of 64457328 is about 400.9505062224.

The spelling of 64457328 in words is "sixty-four million, four hundred fifty-seven thousand, three hundred twenty-eight".