28313137 has 4 divisors (see below), whose sum is σ = 29226496. Its totient is φ = 27399780.

The previous prime is 28313119. The next prime is 28313141. The reversal of 28313137 is 73131382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28313137 - 2⁷ = 28313009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28313147) 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, 456633 + ... + 456694.

It is an arithmetic number, because the mean of its divisors is an integer number (7306624).

Almost surely, 2^28313137 is an apocalyptic number.

It is an amenable number.

28313137 is a deficient number, since it is larger than the sum of its proper divisors (913359).

28313137 is an equidigital number, since it uses as much as digits as its factorization.

28313137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913358.

The product of its digits is 3024, while the sum is 28.

The square root of 28313137 is about 5321.0090208531. The cubic root of 28313137 is about 304.7866895134.

The spelling of 28313137 in words is "twenty-eight million, three hundred thirteen thousand, one hundred thirty-seven".