28776404 has 24 divisors (see below), whose sum is σ = 52738560. Its totient is φ = 13712864.

The previous prime is 28776379. The next prime is 28776421. The reversal of 28776404 is 40467782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43742 + ... + 44394.

It is an arithmetic number, because the mean of its divisors is an integer number (2197440).

Almost surely, 2^28776404 is an apocalyptic number.

It is an amenable number.

28776404 is a deficient number, since it is larger than the sum of its proper divisors (23962156).

28776404 is a wasteful number, since it uses less digits than its factorization.

28776404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 1157 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 28776404 is about 5364.3642680191. The cubic root of 28776404 is about 306.4400378750.

The spelling of 28776404 in words is "twenty-eight million, seven hundred seventy-six thousand, four hundred four".