928407 has 4 divisors (see below), whose sum is σ = 1237880. Its totient is φ = 618936.

The previous prime is 928399. The next prime is 928409. The reversal of 928407 is 704829.

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

It is not a de Polignac number, because 928407 - 2³ = 928399 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 928407.

It is not an unprimeable number, because it can be changed into a prime (928409) 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 3 ways as a sum of consecutive naturals, for example, 154732 + ... + 154737.

It is an arithmetic number, because the mean of its divisors is an integer number (309470).

2⁹²⁸⁴⁰⁷ is an apocalyptic number.

928407 is a deficient number, since it is larger than the sum of its proper divisors (309473).

928407 is a wasteful number, since it uses less digits than its factorization.

928407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309472.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 928407 is about 963.5387900858. The cubic root of 928407 is about 97.5542367535.

The spelling of 928407 in words is "nine hundred twenty-eight thousand, four hundred seven".