28802590 has 16 divisors (see below), whose sum is σ = 54894672. Its totient is φ = 10843264.

The previous prime is 28802569. The next prime is 28802591. The reversal of 28802590 is 9520882.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28802591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84544 + ... + 84883.

It is an arithmetic number, because the mean of its divisors is an integer number (3430917).

Almost surely, 2^28802590 is an apocalyptic number.

28802590 is a deficient number, since it is larger than the sum of its proper divisors (26092082).

28802590 is a wasteful number, since it uses less digits than its factorization.

28802590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169451.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 28802590 is about 5366.8044495770. The cubic root of 28802590 is about 306.5329612997.

It can be divided in two parts, 28802 and 590, that added together give a palindrome (29392).

The spelling of 28802590 in words is "twenty-eight million, eight hundred two thousand, five hundred ninety".