28868490 has 48 divisors (see below), whose sum is σ = 85782528. Its totient is φ = 6598368.

The previous prime is 28868459. The next prime is 28868501. The reversal of 28868490 is 9486882.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22282 + ... + 23541.

It is an arithmetic number, because the mean of its divisors is an integer number (1787136).

Almost surely, 2^28868490 is an apocalyptic number.

28868490 is an abundant number, since it is smaller than the sum of its proper divisors (56914038).

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

28868490 is a wasteful number, since it uses less digits than its factorization.

28868490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45843 (or 45840 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 28868490 is about 5372.9405356843. The cubic root of 28868490 is about 306.7665645453.

The spelling of 28868490 in words is "twenty-eight million, eight hundred sixty-eight thousand, four hundred ninety".