28172795 has 24 divisors (see below), whose sum is σ = 40014000. Its totient is φ = 18981312.

The previous prime is 28172759. The next prime is 28172803. The reversal of 28172795 is 59727182.

It is not a de Polignac number, because 28172795 - 2⁶ = 28172731 is a prime.

It is a super-2 number, since 2×28172795² = 1587412756224050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13481 + ... + 15429.

It is an arithmetic number, because the mean of its divisors is an integer number (1667250).

Almost surely, 2^28172795 is an apocalyptic number.

28172795 is a deficient number, since it is larger than the sum of its proper divisors (11841205).

28172795 is a wasteful number, since it uses less digits than its factorization.

28172795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027 (or 2020 counting only the distinct ones).

The product of its digits is 70560, while the sum is 41.

The square root of 28172795 is about 5307.8051019230. The cubic root of 28172795 is about 304.2822682709.

The spelling of 28172795 in words is "twenty-eight million, one hundred seventy-two thousand, seven hundred ninety-five".