28575131 has 8 divisors (see below), whose sum is σ = 32111520. Its totient is φ = 25229952.

The previous prime is 28575119. The next prime is 28575143. The reversal of 28575131 is 13157582.

It is an interprime number because it is at equal distance from previous prime (28575119) and next prime (28575143).

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

It is a cyclic number.

It is not a de Polignac number, because 28575131 - 2⁶ = 28575067 is a prime.

It is a super-2 number, since 2×28575131² = 1633076223334322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28575191) 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, 47486 + ... + 48083.

It is an arithmetic number, because the mean of its divisors is an integer number (4013940).

Almost surely, 2^28575131 is an apocalyptic number.

28575131 is a deficient number, since it is larger than the sum of its proper divisors (3536389).

28575131 is a wasteful number, since it uses less digits than its factorization.

28575131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95605.

The product of its digits is 8400, while the sum is 32.

The square root of 28575131 is about 5345.5711575097. The cubic root of 28575131 is about 305.7239133366.

The spelling of 28575131 in words is "twenty-eight million, five hundred seventy-five thousand, one hundred thirty-one".