28317957 has 8 divisors (see below), whose sum is σ = 37810560. Its totient is φ = 18852000.

The previous prime is 28317943. The next prime is 28317967. The reversal of 28317957 is 75971382.

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

It is not a de Polignac number, because 28317957 - 2⁸ = 28317701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28317907) 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, 4032 + ... + 8537.

It is an arithmetic number, because the mean of its divisors is an integer number (4726320).

Almost surely, 2^28317957 is an apocalyptic number.

It is an amenable number.

28317957 is a deficient number, since it is larger than the sum of its proper divisors (9492603).

28317957 is a wasteful number, since it uses less digits than its factorization.

28317957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13323.

The product of its digits is 105840, while the sum is 42.

The square root of 28317957 is about 5321.4619231937. The cubic root of 28317957 is about 304.8039840587.

The spelling of 28317957 in words is "twenty-eight million, three hundred seventeen thousand, nine hundred fifty-seven".