28532644 has 12 divisors (see below), whose sum is σ = 57065344. Its totient is φ = 12228264.

The previous prime is 28532641. The next prime is 28532653. The reversal of 28532644 is 44623582.

28532644 is an admirable number.

It is a super-2 number, since 2×28532644² = 1628223547261472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28532641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509484 + ... + 509539.

Almost surely, 2^28532644 is an apocalyptic number.

It is an amenable number.

28532644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28532644 is a wasteful number, since it uses less digits than its factorization.

28532644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019034 (or 1019032 counting only the distinct ones).

The product of its digits is 46080, while the sum is 34.

The square root of 28532644 is about 5341.5956417535. The cubic root of 28532644 is about 305.5723160736.

The spelling of 28532644 in words is "twenty-eight million, five hundred thirty-two thousand, six hundred forty-four".