28412290 has 16 divisors (see below), whose sum is σ = 51470712. Its totient is φ = 11291904.

The previous prime is 28412273. The next prime is 28412323. The reversal of 28412290 is 9221482.

It can be written as a sum of positive squares in 4 ways, for example, as 14417209 + 13995081 = 3797^2 + 3741^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7479 + ... + 10618.

Almost surely, 2^28412290 is an apocalyptic number.

28412290 is a deficient number, since it is larger than the sum of its proper divisors (23058422).

28412290 is a wasteful number, since it uses less digits than its factorization.

28412290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18261.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 28412290 is about 5330.3180017706. The cubic root of 28412290 is about 305.1420640703.

The spelling of 28412290 in words is "twenty-eight million, four hundred twelve thousand, two hundred ninety".