7923138120 has 80 divisors (see below), whose sum is σ = 26630558460. Its totient is φ = 2112835968.

The previous prime is 7923138103. The next prime is 7923138151. The reversal of 7923138120 is 218313297.

It can be written as a sum of positive squares in 2 ways, for example, as 6954559236 + 968578884 = 83394^2 + 31122^2 .

It is a super-2 number, since 2×7923138120² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1219467 + ... + 1225946.

Almost surely, 2^7923138120 is an apocalyptic number.

It is an amenable number.

7923138120 is an abundant number, since it is smaller than the sum of its proper divisors (18707420340).

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

7923138120 is a wasteful number, since it uses less digits than its factorization.

7923138120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445436 (or 2445423 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 7923138120 is about 89012.0110996263. The cubic root of 7923138120 is about 1993.5742201202.

The spelling of 7923138120 in words is "seven billion, nine hundred twenty-three million, one hundred thirty-eight thousand, one hundred twenty".