28748404 has 12 divisors (see below), whose sum is σ = 50365728. Its totient is φ = 14358200.

The previous prime is 28748393. The next prime is 28748417. The reversal of 28748404 is 40484782.

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, 639 + ... + 7609.

It is an arithmetic number, because the mean of its divisors is an integer number (4197144).

Almost surely, 2^28748404 is an apocalyptic number.

It is an amenable number.

28748404 is a deficient number, since it is larger than the sum of its proper divisors (21617324).

28748404 is a wasteful number, since it uses less digits than its factorization.

28748404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8006 (or 8004 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 37.

The square root of 28748404 is about 5361.7538175489. The cubic root of 28748404 is about 306.3406149183.

The spelling of 28748404 in words is "twenty-eight million, seven hundred forty-eight thousand, four hundred four".