28928004 has 48 divisors (see below), whose sum is σ = 77406336. Its totient is φ = 8236800.

The previous prime is 28927973. The next prime is 28928021. The reversal of 28928004 is 40082982.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43434 + ... + 44094.

It is an arithmetic number, because the mean of its divisors is an integer number (1612632).

Almost surely, 2^28928004 is an apocalyptic number.

It is an amenable number.

28928004 is an abundant number, since it is smaller than the sum of its proper divisors (48478332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28928004 is a wasteful number, since it uses less digits than its factorization.

28928004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 28928004 is about 5378.4759923235. The cubic root of 28928004 is about 306.9772253014.

The spelling of 28928004 in words is "twenty-eight million, nine hundred twenty-eight thousand, four".