28165907 has 8 divisors (see below), whose sum is σ = 35116032. Its totient is φ = 21947400.

The previous prime is 28165901. The next prime is 28165909. The reversal of 28165907 is 70956182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28165907 - 2¹⁰ = 28164883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28165901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182819 + ... + 182972.

It is an arithmetic number, because the mean of its divisors is an integer number (4389504).

Almost surely, 2^28165907 is an apocalyptic number.

28165907 is a deficient number, since it is larger than the sum of its proper divisors (6950125).

28165907 is a wasteful number, since it uses less digits than its factorization.

28165907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365809.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 28165907 is about 5307.1562064820. The cubic root of 28165907 is about 304.2574681390.

The spelling of 28165907 in words is "twenty-eight million, one hundred sixty-five thousand, nine hundred seven".