28517955 has 32 divisors (see below), whose sum is σ = 49075200. Its totient is φ = 14095872.

The previous prime is 28517939. The next prime is 28517969. The reversal of 28517955 is 55971582.

It is not a de Polignac number, because 28517955 - 2⁴ = 28517939 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12331 + ... + 14459.

It is an arithmetic number, because the mean of its divisors is an integer number (1533600).

Almost surely, 2^28517955 is an apocalyptic number.

28517955 is a deficient number, since it is larger than the sum of its proper divisors (20557245).

28517955 is a wasteful number, since it uses less digits than its factorization.

28517955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203.

The product of its digits is 126000, while the sum is 42.

The square root of 28517955 is about 5340.2205010655. The cubic root of 28517955 is about 305.5198694534.

The spelling of 28517955 in words is "twenty-eight million, five hundred seventeen thousand, nine hundred fifty-five".