28166957 has 16 divisors (see below), whose sum is σ = 35035392. Its totient is φ = 22049280.

The previous prime is 28166947. The next prime is 28166989. The reversal of 28166957 is 75966182.

It is a cyclic number.

It is not a de Polignac number, because 28166957 - 2⁸ = 28166701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28166947) 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, 7232 + ... + 10422.

It is an arithmetic number, because the mean of its divisors is an integer number (2189712).

Almost surely, 2^28166957 is an apocalyptic number.

It is an amenable number.

28166957 is a deficient number, since it is larger than the sum of its proper divisors (6868435).

28166957 is a wasteful number, since it uses less digits than its factorization.

28166957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308.

The product of its digits is 181440, while the sum is 44.

The square root of 28166957 is about 5307.2551285952. The cubic root of 28166957 is about 304.2612489081.

The spelling of 28166957 in words is "twenty-eight million, one hundred sixty-six thousand, nine hundred fifty-seven".