28976644 has 6 divisors (see below), whose sum is σ = 50709134. Its totient is φ = 14488320.

The previous prime is 28976639. The next prime is 28976659. The reversal of 28976644 is 44667982.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26214400 + 2762244 = 5120^2 + 1662^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28976594 and 28976603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3622077 + ... + 3622084.

Almost surely, 2^28976644 is an apocalyptic number.

It is an amenable number.

28976644 is a deficient number, since it is larger than the sum of its proper divisors (21732490).

28976644 is a wasteful number, since it uses less digits than its factorization.

28976644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7244165 (or 7244163 counting only the distinct ones).

The product of its digits is 580608, while the sum is 46.

The square root of 28976644 is about 5382.9958201730. The cubic root of 28976644 is about 307.1491810694.

The spelling of 28976644 in words is "twenty-eight million, nine hundred seventy-six thousand, six hundred forty-four".