971538740 has 12 divisors (see below), whose sum is σ = 2040231396. Its totient is φ = 388615488.

The previous prime is 971538713. The next prime is 971538749. The reversal of 971538740 is 47835179.

It can be written as a sum of positive squares in 2 ways, for example, as 653415844 + 318122896 = 25562^2 + 17836^2 .

It is a junction number, because it is equal to n+sod(n) for n = 971538691 and 971538700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971538749) 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 3 ways as a sum of consecutive naturals, for example, 24288449 + ... + 24288488.

It is an arithmetic number, because the mean of its divisors is an integer number (170019283).

Almost surely, 2^971538740 is an apocalyptic number.

It is an amenable number.

971538740 is an abundant number, since it is smaller than the sum of its proper divisors (1068692656).

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

971538740 is a wasteful number, since it uses less digits than its factorization.

971538740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48576946 (or 48576944 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 971538740 is about 31169.5161977211. The cubic root of 971538740 is about 990.4214578016.

The spelling of 971538740 in words is "nine hundred seventy-one million, five hundred thirty-eight thousand, seven hundred forty".