28695121 has 16 divisors (see below), whose sum is σ = 36183168. Its totient is φ = 22147200.

The previous prime is 28695103. The next prime is 28695131. The reversal of 28695121 is 12159682.

It is a cyclic number.

It is not a de Polignac number, because 28695121 - 2⁵ = 28695089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28695131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115 + ... + 7576.

It is an arithmetic number, because the mean of its divisors is an integer number (2261448).

Almost surely, 2^28695121 is an apocalyptic number.

It is an amenable number.

28695121 is a deficient number, since it is larger than the sum of its proper divisors (7488047).

28695121 is a wasteful number, since it uses less digits than its factorization.

28695121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752.

The product of its digits is 8640, while the sum is 34.

The square root of 28695121 is about 5356.7827097989. The cubic root of 28695121 is about 306.1512381248.

The spelling of 28695121 in words is "twenty-eight million, six hundred ninety-five thousand, one hundred twenty-one".