64222928 has 90 divisors (see below), whose sum is σ = 159337458. Its totient is φ = 24984960.

The previous prime is 64222919. The next prime is 64222931. The reversal of 64222928 is 82922246.

It can be written as a sum of positive squares in only one way, i.e., 64128064 + 94864 = 8008^2 + 308^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 94526 + ... + 95202.

Almost surely, 2^64222928 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 64222928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79668729).

64222928 is an abundant number, since it is smaller than the sum of its proper divisors (95114530).

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

64222928 is a wasteful number, since it uses less digits than its factorization.

64222928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 697 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 64222928 is about 8013.9208880547. The cubic root of 64222928 is about 400.4638951286.

The spelling of 64222928 in words is "sixty-four million, two hundred twenty-two thousand, nine hundred twenty-eight".