28392250 has 24 divisors (see below), whose sum is σ = 53308476. Its totient is φ = 11323200.

The previous prime is 28392239. The next prime is 28392263. The reversal of 28392250 is 5229382.

It can be written as a sum of positive squares in 6 ways, for example, as 100489 + 28291761 = 317^2 + 5319^2 .

It is a super-2 number, since 2×28392250² = 1612239720125000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84082 + ... + 84418.

Almost surely, 2^28392250 is an apocalyptic number.

28392250 is a deficient number, since it is larger than the sum of its proper divisors (24916226).

28392250 is an frugal number, since it uses more digits than its factorization.

28392250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 28392250 is about 5328.4378573837. The cubic root of 28392250 is about 305.0703053908.

The spelling of 28392250 in words is "twenty-eight million, three hundred ninety-two thousand, two hundred fifty".