28290488 has 16 divisors (see below), whose sum is σ = 53173680. Its totient is φ = 14110848.

The previous prime is 28290463. The next prime is 28290511. The reversal of 28290488 is 88409282.

It is a super-2 number, since 2×28290488² = 1600703422556288, which contains 22 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, 620 + ... + 7547.

It is an arithmetic number, because the mean of its divisors is an integer number (3323355).

Almost surely, 2^28290488 is an apocalyptic number.

It is an amenable number.

28290488 is a deficient number, since it is larger than the sum of its proper divisors (24883192).

28290488 is a wasteful number, since it uses less digits than its factorization.

28290488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8606 (or 8602 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 28290488 is about 5318.8803333032. The cubic root of 28290488 is about 304.7053967993.

The spelling of 28290488 in words is "twenty-eight million, two hundred ninety thousand, four hundred eighty-eight".