7992512440 has 32 divisors (see below), whose sum is σ = 19617986160. Its totient is φ = 2906368000.

The previous prime is 7992512399. The next prime is 7992512453. The reversal of 7992512440 is 442152997.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9081961 + ... + 9082840.

Almost surely, 2^7992512440 is an apocalyptic number.

It is an amenable number.

7992512440 is an abundant number, since it is smaller than the sum of its proper divisors (11625473720).

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

7992512440 is a wasteful number, since it uses less digits than its factorization.

7992512440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18164823 (or 18164819 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 7992512440 is about 89400.8525686416. The cubic root of 7992512440 is about 1999.3758419003.

The spelling of 7992512440 in words is "seven billion, nine hundred ninety-two million, five hundred twelve thousand, four hundred forty".