64422928 has 40 divisors (see below), whose sum is σ = 132848640. Its totient is φ = 30159360.

The previous prime is 64422923. The next prime is 64422973. The reversal of 64422928 is 82922446.

It is not an unprimeable number, because it can be changed into a prime (64422923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64513 + ... + 65503.

It is an arithmetic number, because the mean of its divisors is an integer number (3321216).

Almost surely, 2^64422928 is an apocalyptic number.

64422928 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64422928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66424320).

64422928 is an abundant number, since it is smaller than the sum of its proper divisors (68425712).

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

64422928 is a wasteful number, since it uses less digits than its factorization.

64422928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255 (or 1249 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 64422928 is about 8026.3894747265. The cubic root of 64422928 is about 400.8791662511.

The spelling of 64422928 in words is "sixty-four million, four hundred twenty-two thousand, nine hundred twenty-eight".