28630644 has 48 divisors (see below), whose sum is σ = 80371200. Its totient is φ = 7749216.

The previous prime is 28630643. The next prime is 28630649. The reversal of 28630644 is 44603682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28630643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7374 + ... + 10565.

It is an arithmetic number, because the mean of its divisors is an integer number (1674400).

Almost surely, 2^28630644 is an apocalyptic number.

It is an amenable number.

28630644 is an abundant number, since it is smaller than the sum of its proper divisors (51740556).

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

28630644 is a wasteful number, since it uses less digits than its factorization.

28630644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17972 (or 17970 counting only the distinct ones).

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

The square root of 28630644 is about 5350.7610673623. The cubic root of 28630644 is about 305.9217622185.

The spelling of 28630644 in words is "twenty-eight million, six hundred thirty thousand, six hundred forty-four".