28131590 has 16 divisors (see below), whose sum is σ = 53302320. Its totient is φ = 10660320.

The previous prime is 28131569. The next prime is 28131611. The reversal of 28131590 is 9513182.

It is an interprime number because it is at equal distance from previous prime (28131569) and next prime (28131611).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73841 + ... + 74220.

It is an arithmetic number, because the mean of its divisors is an integer number (3331395).

Almost surely, 2^28131590 is an apocalyptic number.

28131590 is a deficient number, since it is larger than the sum of its proper divisors (25170730).

28131590 is a wasteful number, since it uses less digits than its factorization.

28131590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148087.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 28131590 is about 5303.9221336667. The cubic root of 28131590 is about 304.1338500489.

The spelling of 28131590 in words is "twenty-eight million, one hundred thirty-one thousand, five hundred ninety".