7938993672 has 48 divisors (see below), whose sum is σ = 22025874780. Its totient is φ = 2581785600.

The previous prime is 7938993641. The next prime is 7938993677. The reversal of 7938993672 is 2763998397.

It can be written as a sum of positive squares in 2 ways, for example, as 4944058596 + 2994935076 = 70314^2 + 54726^2 .

It is not an unprimeable number, because it can be changed into a prime (7938993677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1341729 + ... + 1347632.

Almost surely, 2^7938993672 is an apocalyptic number.

7938993672 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

7938993672 is an abundant number, since it is smaller than the sum of its proper divisors (14086881108).

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

7938993672 is a wasteful number, since it uses less digits than its factorization.

7938993672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689414 (or 2689407 counting only the distinct ones).

The product of its digits is 30862944, while the sum is 63.

The square root of 7938993672 is about 89101.0307011092. The cubic root of 7938993672 is about 1994.9031614856.

The spelling of 7938993672 in words is "seven billion, nine hundred thirty-eight million, nine hundred ninety-three thousand, six hundred seventy-two".