971780 has 12 divisors (see below), whose sum is σ = 2040780. Its totient is φ = 388704.

The previous prime is 971767. The next prime is 971783. The reversal of 971780 is 87179.

It can be written as a sum of positive squares in 2 ways, for example, as 498436 + 473344 = 706^2 + 688^2 .

It is not an unprimeable number, because it can be changed into a prime (971783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24275 + ... + 24314.

It is an arithmetic number, because the mean of its divisors is an integer number (170065).

2⁹⁷¹⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

971780 is an abundant number, since it is smaller than the sum of its proper divisors (1069000).

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

971780 is a wasteful number, since it uses less digits than its factorization.

971780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48598 (or 48596 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 971780 is about 985.7890240817. The cubic root of 971780 is about 99.0503434050.

The spelling of 971780 in words is "nine hundred seventy-one thousand, seven hundred eighty".