28603644 has 12 divisors (see below), whose sum is σ = 66741864. Its totient is φ = 9534544.

The previous prime is 28603637. The next prime is 28603711. The reversal of 28603644 is 44630682.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1191807 + ... + 1191830.

It is an arithmetic number, because the mean of its divisors is an integer number (5561822).

Almost surely, 2^28603644 is an apocalyptic number.

It is an amenable number.

28603644 is an abundant number, since it is smaller than the sum of its proper divisors (38138220).

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

28603644 is a wasteful number, since it uses less digits than its factorization.

28603644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383644 (or 2383642 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 28603644 is about 5348.2374666800. The cubic root of 28603644 is about 305.8255659258.

The spelling of 28603644 in words is "twenty-eight million, six hundred three thousand, six hundred forty-four".