6397978794 has 16 divisors (see below), whose sum is σ = 13469429280. Its totient is φ = 2020414320.

The previous prime is 6397978789. The next prime is 6397978799. The reversal of 6397978794 is 4978797936.

It is an interprime number because it is at equal distance from previous prime (6397978789) and next prime (6397978799).

It is not an unprimeable number, because it can be changed into a prime (6397978799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28061197 + ... + 28061424.

It is an arithmetic number, because the mean of its divisors is an integer number (841839330).

Almost surely, 2^6397978794 is an apocalyptic number.

6397978794 is an abundant number, since it is smaller than the sum of its proper divisors (7071450486).

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

6397978794 is a wasteful number, since it uses less digits than its factorization.

6397978794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56122645.

The product of its digits is 144027072, while the sum is 69.

The square root of 6397978794 is about 79987.3664649612. The cubic root of 6397978794 is about 1856.4400627162.

The spelling of 6397978794 in words is "six billion, three hundred ninety-seven million, nine hundred seventy-eight thousand, seven hundred ninety-four".