28490529 has 16 divisors (see below), whose sum is σ = 38656640. Its totient is φ = 18662400.

The previous prime is 28490509. The next prime is 28490533. The reversal of 28490529 is 92509482.

It is not a de Polignac number, because 28490529 - 2⁹ = 28490017 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28490509) 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 15 ways as a sum of consecutive naturals, for example, 49089 + ... + 49665.

It is an arithmetic number, because the mean of its divisors is an integer number (2416040).

Almost surely, 2^28490529 is an apocalyptic number.

It is an amenable number.

28490529 is a deficient number, since it is larger than the sum of its proper divisors (10166111).

28490529 is a wasteful number, since it uses less digits than its factorization.

28490529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 28490529 is about 5337.6520118869. The cubic root of 28490529 is about 305.4218975442.

The spelling of 28490529 in words is "twenty-eight million, four hundred ninety thousand, five hundred twenty-nine".