28906113 has 4 divisors (see below), whose sum is σ = 38541488. Its totient is φ = 19270740.

The previous prime is 28906093. The next prime is 28906117. The reversal of 28906113 is 31160982.

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 28906113 - 2¹² = 28902017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28906117) 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, 4817683 + ... + 4817688.

It is an arithmetic number, because the mean of its divisors is an integer number (9635372).

Almost surely, 2^28906113 is an apocalyptic number.

It is an amenable number.

28906113 is a deficient number, since it is larger than the sum of its proper divisors (9635375).

28906113 is an equidigital number, since it uses as much as digits as its factorization.

28906113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9635374.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 28906113 is about 5376.4405511453. The cubic root of 28906113 is about 306.8997717002.

The spelling of 28906113 in words is "twenty-eight million, nine hundred six thousand, one hundred thirteen".