28582390 has 16 divisors (see below), whose sum is σ = 51602832. Its totient is φ = 11398624.

The previous prime is 28582387. The next prime is 28582417. The reversal of 28582390 is 9328582.

It is a super-2 number, since 2×28582390² = 1633906036224200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649 + ... + 7588.

It is an arithmetic number, because the mean of its divisors is an integer number (3225177).

Almost surely, 2^28582390 is an apocalyptic number.

28582390 is a deficient number, since it is larger than the sum of its proper divisors (23020442).

28582390 is a wasteful number, since it uses less digits than its factorization.

28582390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8591.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 28582390 is about 5346.2500876783. The cubic root of 28582390 is about 305.7497990388.

The spelling of 28582390 in words is "twenty-eight million, five hundred eighty-two thousand, three hundred ninety".