28627644 has 12 divisors (see below), whose sum is σ = 66797864. Its totient is φ = 9542544.

The previous prime is 28627631. The next prime is 28627681. The reversal of 28627644 is 44672682.

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

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 1192807 + ... + 1192830.

Almost surely, 2^28627644 is an apocalyptic number.

It is an amenable number.

28627644 is an abundant number, since it is smaller than the sum of its proper divisors (38170220).

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

28627644 is a wasteful number, since it uses less digits than its factorization.

28627644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2385644 (or 2385642 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

The square root of 28627644 is about 5350.4807260656. The cubic root of 28627644 is about 305.9110767289.

The spelling of 28627644 in words is "twenty-eight million, six hundred twenty-seven thousand, six hundred forty-four".