28931106 has 16 divisors (see below), whose sum is σ = 57915648. Its totient is φ = 9634800.

The previous prime is 28931099. The next prime is 28931191. The reversal of 28931106 is 60113982.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9871 + ... + 12461.

It is an arithmetic number, because the mean of its divisors is an integer number (3619728).

Almost surely, 2^28931106 is an apocalyptic number.

28931106 is an abundant number, since it is smaller than the sum of its proper divisors (28984542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28931106 is a wasteful number, since it uses less digits than its factorization.

28931106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4457.

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

The square root of 28931106 is about 5378.7643562439. The cubic root of 28931106 is about 306.9881974759.

The spelling of 28931106 in words is "twenty-eight million, nine hundred thirty-one thousand, one hundred six".