979780 has 12 divisors (see below), whose sum is σ = 2057580. Its totient is φ = 391904.

The previous prime is 979757. The next prime is 979787. The reversal of 979780 is 87979.

It can be written as a sum of positive squares in 2 ways, for example, as 103684 + 876096 = 322^2 + 936^2 .

It is not an unprimeable number, because it can be changed into a prime (979787) 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, 24475 + ... + 24514.

It is an arithmetic number, because the mean of its divisors is an integer number (171465).

2⁹⁷⁹⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

979780 is an abundant number, since it is smaller than the sum of its proper divisors (1077800).

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

979780 is a wasteful number, since it uses less digits than its factorization.

979780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48998 (or 48996 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 979780 is about 989.8383706444. The cubic root of 979780 is about 99.3214055114.

The spelling of 979780 in words is "nine hundred seventy-nine thousand, seven hundred eighty".