928439 has 4 divisors (see below), whose sum is σ = 937224. Its totient is φ = 919656.

The previous prime is 928429. The next prime is 928453. The reversal of 928439 is 934829.

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

It is a cyclic number.

It is not a de Polignac number, because 928439 - 2⁴ = 928423 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 928399 and 928408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (928409) 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, 4232 + ... + 4445.

It is an arithmetic number, because the mean of its divisors is an integer number (234306).

2⁹²⁸⁴³⁹ is an apocalyptic number.

928439 is a deficient number, since it is larger than the sum of its proper divisors (8785).

928439 is a wasteful number, since it uses less digits than its factorization.

928439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8784.

The product of its digits is 15552, while the sum is 35.

The square root of 928439 is about 963.5553953977. Note that the first 3 decimals coincide. The cubic root of 928439 is about 97.5553575622. Note that the first 3 decimals are identical.

The spelling of 928439 in words is "nine hundred twenty-eight thousand, four hundred thirty-nine".