28577031 has 8 divisors (see below), whose sum is σ = 43545984. Its totient is φ = 16329720.

The previous prime is 28577027. The next prime is 28577039. The reversal of 28577031 is 13077582.

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

It is not a de Polignac number, because 28577031 - 2² = 28577027 is a prime.

It is a super-2 number, since 2×28577031² = 1633293401549922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28576983 and 28577001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28577039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680385 + ... + 680426.

It is an arithmetic number, because the mean of its divisors is an integer number (5443248).

Almost surely, 2^28577031 is an apocalyptic number.

28577031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28577031 is a deficient number, since it is larger than the sum of its proper divisors (14968953).

28577031 is a wasteful number, since it uses less digits than its factorization.

28577031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360821.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 28577031 is about 5345.7488717672. The cubic root of 28577031 is about 305.7306891884.

The spelling of 28577031 in words is "twenty-eight million, five hundred seventy-seven thousand, thirty-one".