971620280 has 32 divisors (see below), whose sum is σ = 2281197600. Its totient is φ = 371750016.

The previous prime is 971620277. The next prime is 971620301. The reversal of 971620280 is 82026179.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 971620280.

It is a congruent number.

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, 527135 + ... + 528974.

It is an arithmetic number, because the mean of its divisors is an integer number (71287425).

Almost surely, 2^971620280 is an apocalyptic number.

It is an amenable number.

971620280 is an abundant number, since it is smaller than the sum of its proper divisors (1309577320).

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

971620280 is a wasteful number, since it uses less digits than its factorization.

971620280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056143 (or 1056139 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 971620280 is about 31170.8241790300. The cubic root of 971620280 is about 990.4491652938.

The spelling of 971620280 in words is "nine hundred seventy-one million, six hundred twenty thousand, two hundred eighty".