28392426 has 12 divisors (see below), whose sum is σ = 61516962. Its totient is φ = 9464136.

The previous prime is 28392409. The next prime is 28392433. The reversal of 28392426 is 62429382.

It can be written as a sum of positive squares in only one way, i.e., 23765625 + 4626801 = 4875^2 + 2151^2 .

It is a super-2 number, since 2×28392426² = 1612259708330952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 788661 + ... + 788696.

Almost surely, 2^28392426 is an apocalyptic number.

28392426 is an abundant number, since it is smaller than the sum of its proper divisors (33124536).

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

28392426 is a wasteful number, since it uses less digits than its factorization.

28392426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577365 (or 1577362 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 28392426 is about 5328.4543725174. The cubic root of 28392426 is about 305.0709357537.

The spelling of 28392426 in words is "twenty-eight million, three hundred ninety-two thousand, four hundred twenty-six".