28668038 has 12 divisors (see below), whose sum is σ = 50022972. Its totient is φ = 12286260.

The previous prime is 28668023. The next prime is 28668053. The reversal of 28668038 is 83086682.

It is an interprime number because it is at equal distance from previous prime (28668023) and next prime (28668053).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28667986 and 28668004.

It is a congruent number.

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, 146168 + ... + 146363.

It is an arithmetic number, because the mean of its divisors is an integer number (4168581).

Almost surely, 2^28668038 is an apocalyptic number.

28668038 is a deficient number, since it is larger than the sum of its proper divisors (21354934).

28668038 is a wasteful number, since it uses less digits than its factorization.

28668038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292547 (or 292540 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 28668038 is about 5354.2541964311. The cubic root of 28668038 is about 306.0548906899.

The spelling of 28668038 in words is "twenty-eight million, six hundred sixty-eight thousand, thirty-eight".