28570297 has 8 divisors (see below), whose sum is σ = 32745600. Its totient is φ = 24418464.

The previous prime is 28570291. The next prime is 28570331. The reversal of 28570297 is 79207582.

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

It is not a de Polignac number, because 28570297 - 2⁷ = 28570169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28570291) 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, 3172 + ... + 8197.

It is an arithmetic number, because the mean of its divisors is an integer number (4093200).

Almost surely, 2^28570297 is an apocalyptic number.

It is an amenable number.

28570297 is a deficient number, since it is larger than the sum of its proper divisors (4175303).

28570297 is a wasteful number, since it uses less digits than its factorization.

28570297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11735.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 28570297 is about 5345.1189883856. The cubic root of 28570297 is about 305.7066727887.

The spelling of 28570297 in words is "twenty-eight million, five hundred seventy thousand, two hundred ninety-seven".