7938994372 has 6 divisors (see below), whose sum is σ = 13893240158. Its totient is φ = 3969497184.

The previous prime is 7938994361. The next prime is 7938994397. The reversal of 7938994372 is 2734998397.

It can be written as a sum of positive squares in only one way, i.e., 7794417796 + 144576576 = 88286^2 + 12024^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7938994372.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992374293 + ... + 992374300.

Almost surely, 2^7938994372 is an apocalyptic number.

It is an amenable number.

7938994372 is a deficient number, since it is larger than the sum of its proper divisors (5954245786).

7938994372 is a wasteful number, since it uses less digits than its factorization.

7938994372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984748597 (or 1984748595 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 61.

The square root of 7938994372 is about 89101.0346292342. The cubic root of 7938994372 is about 1994.9032201174.

The spelling of 7938994372 in words is "seven billion, nine hundred thirty-eight million, nine hundred ninety-four thousand, three hundred seventy-two".