28015408 has 20 divisors (see below), whose sum is σ = 54382680. Its totient is φ = 13981184.

The previous prime is 28015399. The next prime is 28015417. The reversal of 28015408 is 80451082.

It is an interprime number because it is at equal distance from previous prime (28015399) and next prime (28015417).

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, 9216 + ... + 11872.

It is an arithmetic number, because the mean of its divisors is an integer number (2719134).

Almost surely, 2^28015408 is an apocalyptic number.

It is an amenable number.

28015408 is a deficient number, since it is larger than the sum of its proper divisors (26367272).

28015408 is a wasteful number, since it uses less digits than its factorization.

28015408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3324 (or 3318 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 28015408 is about 5292.9583410414. The cubic root of 28015408 is about 303.7145866915.

The spelling of 28015408 in words is "twenty-eight million, fifteen thousand, four hundred eight".