928531 has 4 divisors (see below), whose sum is σ = 930600. Its totient is φ = 926464.

The previous prime is 928513. The next prime is 928547. The reversal of 928531 is 135829.

928531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-928531 is a prime.

It is a super-2 number, since 2×928531² = 1724339635922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 928531.

It is not an unprimeable number, because it can be changed into a prime (928561) 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, 46 + ... + 1363.

It is an arithmetic number, because the mean of its divisors is an integer number (232650).

2⁹²⁸⁵³¹ is an apocalyptic number.

928531 is a deficient number, since it is larger than the sum of its proper divisors (2069).

928531 is a wasteful number, since it uses less digits than its factorization.

928531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068.

The product of its digits is 2160, while the sum is 28.

The square root of 928531 is about 963.6031340754. The cubic root of 928531 is about 97.5585797435.

It can be divided in two parts, 9285 and 31, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 928531 in words is "nine hundred twenty-eight thousand, five hundred thirty-one".