7937217940 has 12 divisors (see below), whose sum is σ = 16668157716. Its totient is φ = 3174887168.

The previous prime is 7937217881. The next prime is 7937217983. The reversal of 7937217940 is 497127397.

It can be written as a sum of positive squares in 2 ways, for example, as 2953705104 + 4983512836 = 54348^2 + 70594^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198430429 + ... + 198430468.

It is an arithmetic number, because the mean of its divisors is an integer number (1389013143).

Almost surely, 2^7937217940 is an apocalyptic number.

It is an amenable number.

7937217940 is an abundant number, since it is smaller than the sum of its proper divisors (8730939776).

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

7937217940 is a wasteful number, since it uses less digits than its factorization.

7937217940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396860906 (or 396860904 counting only the distinct ones).

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 7937217940 is about 89091.0654330725. The cubic root of 7937217940 is about 1994.7544156171.

The spelling of 7937217940 in words is "seven billion, nine hundred thirty-seven million, two hundred seventeen thousand, nine hundred forty".