28876737 has 4 divisors (see below), whose sum is σ = 38502320. Its totient is φ = 19251156.

The previous prime is 28876733. The next prime is 28876739. The reversal of 28876737 is 73767882.

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 not a de Polignac number, because 28876737 - 2² = 28876733 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28876733) 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, 4812787 + ... + 4812792.

It is an arithmetic number, because the mean of its divisors is an integer number (9625580).

Almost surely, 2^28876737 is an apocalyptic number.

It is an amenable number.

28876737 is a deficient number, since it is larger than the sum of its proper divisors (9625583).

28876737 is an equidigital number, since it uses as much as digits as its factorization.

28876737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9625582.

The product of its digits is 790272, while the sum is 48.

The square root of 28876737 is about 5373.7079377279. The cubic root of 28876737 is about 306.7957735893.

The spelling of 28876737 in words is "twenty-eight million, eight hundred seventy-six thousand, seven hundred thirty-seven".