64255828 has 72 divisors (see below), whose sum is σ = 143308032. Its totient is φ = 24665472.

The previous prime is 64255823. The next prime is 64255837. The reversal of 64255828 is 82855246.

It is a super-2 number, since 2×64255828² = 8257622863931168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64255823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174901 + ... + 175267.

Almost surely, 2^64255828 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 64255828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71654016).

64255828 is an abundant number, since it is smaller than the sum of its proper divisors (79052204).

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

64255828 is a wasteful number, since it uses less digits than its factorization.

64255828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 426 counting only the distinct ones).

The product of its digits is 153600, while the sum is 40.

The square root of 64255828 is about 8015.9733033488. The cubic root of 64255828 is about 400.5322664170.

The spelling of 64255828 in words is "sixty-four million, two hundred fifty-five thousand, eight hundred twenty-eight".