6393774628 has 12 divisors (see below), whose sum is σ = 11220805260. Its totient is φ = 3187830272.

The previous prime is 6393774617. The next prime is 6393774631. The reversal of 6393774628 is 8264773936.

It can be written as a sum of positive squares in 2 ways, for example, as 4964329764 + 1429444864 = 70458^2 + 37808^2 .

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, 2262673 + ... + 2265496.

It is an arithmetic number, because the mean of its divisors is an integer number (935067105).

Almost surely, 2^6393774628 is an apocalyptic number.

It is an amenable number.

6393774628 is a deficient number, since it is larger than the sum of its proper divisors (4827030632).

6393774628 is a wasteful number, since it uses less digits than its factorization.

6393774628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4528526 (or 4528524 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 55.

The square root of 6393774628 is about 79961.0819586629. The cubic root of 6393774628 is about 1856.0333461266.

The spelling of 6393774628 in words is "six billion, three hundred ninety-three million, seven hundred seventy-four thousand, six hundred twenty-eight".