28658304 has 48 divisors (see below), whose sum is σ = 82470570. Its totient is φ = 9552384.

The previous prime is 28658281. The next prime is 28658317. The reversal of 28658304 is 40385682.

It can be written as a sum of positive squares in only one way, i.e., 28643904 + 14400 = 5352^2 + 120^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11287 + ... + 13590.

Almost surely, 2^28658304 is an apocalyptic number.

28658304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28658304 is an abundant number, since it is smaller than the sum of its proper divisors (53812266).

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

28658304 is a wasteful number, since it uses less digits than its factorization.

28658304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24897 (or 24882 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 28658304 is about 5353.3451224445. The cubic root of 28658304 is about 306.0202472826.

The spelling of 28658304 in words is "twenty-eight million, six hundred fifty-eight thousand, three hundred four".