64433928 has 32 divisors (see below), whose sum is σ = 173476800. Its totient is φ = 19825728.

The previous prime is 64433917. The next prime is 64433939. The reversal of 64433928 is 82933446.

It is an interprime number because it is at equal distance from previous prime (64433917) and next prime (64433939).

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

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, 102948 + ... + 103571.

It is an arithmetic number, because the mean of its divisors is an integer number (5421150).

Almost surely, 2^64433928 is an apocalyptic number.

It is an amenable number.

64433928 is an abundant number, since it is smaller than the sum of its proper divisors (109042872).

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

64433928 is a wasteful number, since it uses less digits than its factorization.

64433928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206541 (or 206537 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 64433928 is about 8027.0746850892. The cubic root of 64433928 is about 400.9019812126.

The spelling of 64433928 in words is "sixty-four million, four hundred thirty-three thousand, nine hundred twenty-eight".