971981380 has 24 divisors (see below), whose sum is σ = 2129908032. Its totient is φ = 371888352.

The previous prime is 971981369. The next prime is 971981393. The reversal of 971981380 is 83189179.

971981380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 971981380.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1056042 + ... + 1056961.

It is an arithmetic number, because the mean of its divisors is an integer number (88746168).

Almost surely, 2^971981380 is an apocalyptic number.

It is an amenable number.

971981380 is an abundant number, since it is smaller than the sum of its proper divisors (1157926652).

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

971981380 is a wasteful number, since it uses less digits than its factorization.

971981380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113035 (or 2113033 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 971981380 is about 31176.6159164204. The cubic root of 971981380 is about 990.5718493311.

The spelling of 971981380 in words is "nine hundred seventy-one million, nine hundred eighty-one thousand, three hundred eighty".