6397444026 has 12 divisors (see below), whose sum is σ = 13861128762. Its totient is φ = 2132481336.

The previous prime is 6397443989. The next prime is 6397444033. The reversal of 6397444026 is 6204447936.

It is a happy number.

6397444026 is a `hidden beast` number, since 639 + 7 + 4 + 4 + 4 + 0 + 2 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6068565801 + 328878225 = 77901^2 + 18135^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 177706761 + ... + 177706796.

Almost surely, 2^6397444026 is an apocalyptic number.

6397444026 is an abundant number, since it is smaller than the sum of its proper divisors (7463684736).

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

6397444026 is a wasteful number, since it uses less digits than its factorization.

6397444026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355413565 (or 355413562 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The square root of 6397444026 is about 79984.0235672100. The cubic root of 6397444026 is about 1856.3883384435.

The spelling of 6397444026 in words is "six billion, three hundred ninety-seven million, four hundred forty-four thousand, twenty-six".