28398004 has 12 divisors (see below), whose sum is σ = 49744800. Its totient is φ = 14185208.

The previous prime is 28397987. The next prime is 28398037. The reversal of 28398004 is 40089382.

It is a super-3 number, since 3×28398004³ (a number of 23 digits) contains 333 as substring.

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, 2217 + ... + 7855.

It is an arithmetic number, because the mean of its divisors is an integer number (4145400).

Almost surely, 2^28398004 is an apocalyptic number.

It is an amenable number.

28398004 is a deficient number, since it is larger than the sum of its proper divisors (21346796).

28398004 is a wasteful number, since it uses less digits than its factorization.

28398004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6902 (or 6900 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28398004 is about 5328.9777631362. The cubic root of 28398004 is about 305.0909126102.

The spelling of 28398004 in words is "twenty-eight million, three hundred ninety-eight thousand, four".