979440 has 160 divisors (see below), whose sum is σ = 3856896. Its totient is φ = 199680.

The previous prime is 979439. The next prime is 979457. The reversal of 979440 is 44979.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18454 + ... + 18506.

2⁹⁷⁹⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 979440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928448).

979440 is an abundant number, since it is smaller than the sum of its proper divisors (2877456).

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

979440 is a wasteful number, since it uses less digits than its factorization.

979440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 979440 is about 989.6666105310. Note that the first 4 decimals coincide. The cubic root of 979440 is about 99.3099154542.

The spelling of 979440 in words is "nine hundred seventy-nine thousand, four hundred forty".