28575031 has 8 divisors (see below), whose sum is σ = 30529280. Its totient is φ = 26665848.

The previous prime is 28574999. The next prime is 28575061. The reversal of 28575031 is 13057582.

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 28575031 - 2⁵ = 28574999 is a prime.

It is a super-2 number, since 2×28575031² = 1633064793301922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28574984 and 28575002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28575061) 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, 9951 + ... + 12496.

It is an arithmetic number, because the mean of its divisors is an integer number (3816160).

Almost surely, 2^28575031 is an apocalyptic number.

28575031 is a deficient number, since it is larger than the sum of its proper divisors (1954249).

28575031 is a wasteful number, since it uses less digits than its factorization.

28575031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22533.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 28575031 is about 5345.5618039641. The cubic root of 28575031 is about 305.7235567045.

The spelling of 28575031 in words is "twenty-eight million, five hundred seventy-five thousand, thirty-one".