28833131 has 4 divisors (see below), whose sum is σ = 29763264. Its totient is φ = 27903000.

The previous prime is 28833109. The next prime is 28833151. The reversal of 28833131 is 13133882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28833131 - 2⁶ = 28833067 is a prime.

It is a super-2 number, since 2×28833131² = 1662698886526322, which contains 22 as substring.

It is a Duffinian number.

28833131 is a modest number, since divided by 3131 gives 2883 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 28833094 and 28833103.

It is not an unprimeable number, because it can be changed into a prime (28833151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465020 + ... + 465081.

It is an arithmetic number, because the mean of its divisors is an integer number (7440816).

Almost surely, 2^28833131 is an apocalyptic number.

28833131 is a deficient number, since it is larger than the sum of its proper divisors (930133).

28833131 is an equidigital number, since it uses as much as digits as its factorization.

28833131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930132.

The product of its digits is 3456, while the sum is 29.

The square root of 28833131 is about 5369.6490574338. The cubic root of 28833131 is about 306.6412677190.

The spelling of 28833131 in words is "twenty-eight million, eight hundred thirty-three thousand, one hundred thirty-one".