28131883 has 8 divisors (see below), whose sum is σ = 30432528. Its totient is φ = 25850784.

The previous prime is 28131881. The next prime is 28131899. The reversal of 28131883 is 38813182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28131883 - 2¹ = 28131881 is a prime.

It is a super-2 number, since 2×28131883² = 1582805682251378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28131881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1816 + ... + 7717.

It is an arithmetic number, because the mean of its divisors is an integer number (3804066).

Almost surely, 2^28131883 is an apocalyptic number.

28131883 is a deficient number, since it is larger than the sum of its proper divisors (2300645).

28131883 is a wasteful number, since it uses less digits than its factorization.

28131883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9773.

The product of its digits is 9216, while the sum is 34.

The square root of 28131883 is about 5303.9497546640. The cubic root of 28131883 is about 304.1349059308.

The spelling of 28131883 in words is "twenty-eight million, one hundred thirty-one thousand, eight hundred eighty-three".