28628944 has 10 divisors (see below), whose sum is σ = 55468610. Its totient is φ = 14314464.

The previous prime is 28628923. The next prime is 28628981. The reversal of 28628944 is 44982682.

It can be written as a sum of positive squares in only one way, i.e., 26132544 + 2496400 = 5112^2 + 1580^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28628944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 894639 + ... + 894670.

It is an arithmetic number, because the mean of its divisors is an integer number (5546861).

Almost surely, 2^28628944 is an apocalyptic number.

It is an amenable number.

28628944 is a deficient number, since it is larger than the sum of its proper divisors (26839666).

28628944 is a wasteful number, since it uses less digits than its factorization.

28628944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789317 (or 1789311 counting only the distinct ones).

The product of its digits is 221184, while the sum is 43.

The square root of 28628944 is about 5350.6022090976. The cubic root of 28628944 is about 305.9157071994.

The spelling of 28628944 in words is "twenty-eight million, six hundred twenty-eight thousand, nine hundred forty-four".