28570497 has 4 divisors (see below), whose sum is σ = 38094000. Its totient is φ = 19046996.

The previous prime is 28570483. The next prime is 28570511. The reversal of 28570497 is 79407582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (28570483) and next prime (28570511).

It is a cyclic number.

It is not a de Polignac number, because 28570497 - 2¹² = 28566401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28570417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4761747 + ... + 4761752.

It is an arithmetic number, because the mean of its divisors is an integer number (9523500).

Almost surely, 2^28570497 is an apocalyptic number.

It is an amenable number.

28570497 is a deficient number, since it is larger than the sum of its proper divisors (9523503).

28570497 is an equidigital number, since it uses as much as digits as its factorization.

28570497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9523502.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 28570497 is about 5345.1376970102. The cubic root of 28570497 is about 305.7073861309.

The spelling of 28570497 in words is "twenty-eight million, five hundred seventy thousand, four hundred ninety-seven".