28879250 has 32 divisors (see below), whose sum is σ = 54857088. Its totient is φ = 11382000.

The previous prime is 28879247. The next prime is 28879267. The reversal of 28879250 is 5297882.

It is a happy number.

It is a super-2 number, since 2×28879250² = 1668022161125000, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28879198 and 28879207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16937 + ... + 18563.

It is an arithmetic number, because the mean of its divisors is an integer number (1714284).

Almost surely, 2^28879250 is an apocalyptic number.

28879250 is a deficient number, since it is larger than the sum of its proper divisors (25977838).

28879250 is a wasteful number, since it uses less digits than its factorization.

28879250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715 (or 1705 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 28879250 is about 5373.9417562903. The cubic root of 28879250 is about 306.8046729722.

The spelling of 28879250 in words is "twenty-eight million, eight hundred seventy-nine thousand, two hundred fifty".