28537490 has 16 divisors (see below), whose sum is σ = 51710400. Its totient is φ = 11338800.

The previous prime is 28537477. The next prime is 28537493. The reversal of 28537490 is 9473582.

It is not an unprimeable number, because it can be changed into a prime (28537493) by changing a digit.

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, 7940 + ... + 10959.

It is an arithmetic number, because the mean of its divisors is an integer number (3231900).

Almost surely, 2^28537490 is an apocalyptic number.

28537490 is a deficient number, since it is larger than the sum of its proper divisors (23172910).

28537490 is a wasteful number, since it uses less digits than its factorization.

28537490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19057.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 28537490 is about 5342.0492322703. The cubic root of 28537490 is about 305.5896146179.

The spelling of 28537490 in words is "twenty-eight million, five hundred thirty-seven thousand, four hundred ninety".