979428 has 12 divisors (see below), whose sum is σ = 2285360. Its totient is φ = 326472.

The previous prime is 979423. The next prime is 979439. The reversal of 979428 is 824979.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (979423) by changing a digit.

979428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40798 + ... + 40821.

2⁹⁷⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

979428 is an abundant number, since it is smaller than the sum of its proper divisors (1305932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

979428 is a wasteful number, since it uses less digits than its factorization.

979428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81626 (or 81624 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 979428 is about 989.6605478648. The cubic root of 979428 is about 99.3095098742.

Subtracting from 979428 its reverse (824979), we obtain a square (154449 = 393²).

The spelling of 979428 in words is "nine hundred seventy-nine thousand, four hundred twenty-eight".