7999857072 has 30 divisors (see below), whose sum is σ = 22388489292. Its totient is φ = 2666618976.

The previous prime is 7999857049. The next prime is 7999857091. The reversal of 7999857072 is 2707589997.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27777138 + ... + 27777425.

Almost surely, 2^7999857072 is an apocalyptic number.

7999857072 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

7999857072 is an abundant number, since it is smaller than the sum of its proper divisors (14388632220).

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

7999857072 is a wasteful number, since it uses less digits than its factorization.

7999857072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55554577 (or 55554568 counting only the distinct ones).

The product of its (nonzero) digits is 20003760, while the sum is 63.

The square root of 7999857072 is about 89441.9201046131. The cubic root of 7999857072 is about 1999.9880892624.

The spelling of 7999857072 in words is "seven billion, nine hundred ninety-nine million, eight hundred fifty-seven thousand, seventy-two".