28131950 has 48 divisors (see below), whose sum is σ = 65245824. Its totient is φ = 8767200.

The previous prime is 28131947. The next prime is 28131953. The reversal of 28131950 is 5913182.

It is an interprime number because it is at equal distance from previous prime (28131947) and next prime (28131953).

It is a super-2 number, since 2×28131950² = 1582813221605000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28131953) 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 23 ways as a sum of consecutive naturals, for example, 197 + ... + 7503.

It is an arithmetic number, because the mean of its divisors is an integer number (1359288).

Almost surely, 2^28131950 is an apocalyptic number.

28131950 is an abundant number, since it is smaller than the sum of its proper divisors (37113874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28131950 is a wasteful number, since it uses less digits than its factorization.

28131950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7337 (or 7332 counting only the distinct ones).

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

The square root of 28131950 is about 5303.9560707080. The cubic root of 28131950 is about 304.1351473772.

The spelling of 28131950 in words is "twenty-eight million, one hundred thirty-one thousand, nine hundred fifty".