979818 has 32 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 272640.

The previous prime is 979807. The next prime is 979819. The reversal of 979818 is 818979.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 979818.

It is not an unprimeable number, because it can be changed into a prime (979819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1438 + ... + 2006.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2⁹⁷⁹⁸¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 979818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149120).

979818 is an abundant number, since it is smaller than the sum of its proper divisors (1318422).

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

979818 is a wasteful number, since it uses less digits than its factorization.

979818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622.

The product of its digits is 36288, while the sum is 42.

The square root of 979818 is about 989.8575655113. The cubic root of 979818 is about 99.3226895291.

The spelling of 979818 in words is "nine hundred seventy-nine thousand, eight hundred eighteen".