7938040992 has 48 divisors (see below), whose sum is σ = 23814124992. Its totient is φ = 2268011520.

The previous prime is 7938040973. The next prime is 7938040997. The reversal of 7938040992 is 2990408397.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (7938040997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5905609 + ... + 5906952.

It is an arithmetic number, because the mean of its divisors is an integer number (496127604).

Almost surely, 2^7938040992 is an apocalyptic number.

It is an amenable number.

7938040992 is an abundant number, since it is smaller than the sum of its proper divisors (15876084000).

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

7938040992 is a wasteful number, since it uses less digits than its factorization.

7938040992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11812581 (or 11812573 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 7938040992 is about 89095.6844746141. The cubic root of 7938040992 is about 1994.8233621035.

The spelling of 7938040992 in words is "seven billion, nine hundred thirty-eight million, forty thousand, nine hundred ninety-two".