28631090 has 32 divisors (see below), whose sum is σ = 54089856. Its totient is φ = 10890880.

The previous prime is 28631069. The next prime is 28631093. The reversal of 28631090 is 9013682.

It is not an unprimeable number, because it can be changed into a prime (28631093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64409 + ... + 64851.

It is an arithmetic number, because the mean of its divisors is an integer number (1690308).

Almost surely, 2^28631090 is an apocalyptic number.

28631090 is a deficient number, since it is larger than the sum of its proper divisors (25458766).

28631090 is a wasteful number, since it uses less digits than its factorization.

28631090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 28631090 is about 5350.8027435143. The cubic root of 28631090 is about 305.9233507308.

Adding to 28631090 its product of nonzero digits (2592), we get a palindrome (28633682).

The spelling of 28631090 in words is "twenty-eight million, six hundred thirty-one thousand, ninety".