7923678340 has 12 divisors (see below), whose sum is σ = 16639724556. Its totient is φ = 3169471328.

The previous prime is 7923678307. The next prime is 7923678391. The reversal of 7923678340 is 438763297.

It can be written as a sum of positive squares in 2 ways, for example, as 1896950916 + 6026727424 = 43554^2 + 77632^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198091939 + ... + 198091978.

It is an arithmetic number, because the mean of its divisors is an integer number (1386643713).

Almost surely, 2^7923678340 is an apocalyptic number.

It is an amenable number.

7923678340 is an abundant number, since it is smaller than the sum of its proper divisors (8716046216).

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

7923678340 is a wasteful number, since it uses less digits than its factorization.

7923678340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396183926 (or 396183924 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 49.

The square root of 7923678340 is about 89015.0455821936. The cubic root of 7923678340 is about 1993.6195281018.

The spelling of 7923678340 in words is "seven billion, nine hundred twenty-three million, six hundred seventy-eight thousand, three hundred forty".