28403044 has 6 divisors (see below), whose sum is σ = 49705334. Its totient is φ = 14201520.

The previous prime is 28403033. The next prime is 28403047. The reversal of 28403044 is 44030482.

It can be written as a sum of positive squares in only one way, i.e., 22202944 + 6200100 = 4712^2 + 2490^2 .

It is not an unprimeable number, because it can be changed into a prime (28403047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3550377 + ... + 3550384.

Almost surely, 2^28403044 is an apocalyptic number.

It is an amenable number.

28403044 is a deficient number, since it is larger than the sum of its proper divisors (21302290).

28403044 is a wasteful number, since it uses less digits than its factorization.

28403044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7100765 (or 7100763 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 28403044 is about 5329.4506283481. The cubic root of 28403044 is about 305.1089604425.

The spelling of 28403044 in words is "twenty-eight million, four hundred three thousand, forty-four".