7916689940 has 12 divisors (see below), whose sum is σ = 16625048916. Its totient is φ = 3166675968.

The previous prime is 7916689933. The next prime is 7916689951. The reversal of 7916689940 is 499866197.

It can be written as a sum of positive squares in 2 ways, for example, as 6111799684 + 1804890256 = 78178^2 + 42484^2 .

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 7916689940.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197917229 + ... + 197917268.

It is an arithmetic number, because the mean of its divisors is an integer number (1385420743).

Almost surely, 2^7916689940 is an apocalyptic number.

It is an amenable number.

7916689940 is an abundant number, since it is smaller than the sum of its proper divisors (8708358976).

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

7916689940 is a wasteful number, since it uses less digits than its factorization.

7916689940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395834506 (or 395834504 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 59.

The square root of 7916689940 is about 88975.7828850075. The cubic root of 7916689940 is about 1993.0332554128.

The spelling of 7916689940 in words is "seven billion, nine hundred sixteen million, six hundred eighty-nine thousand, nine hundred forty".