6398705458 has 8 divisors (see below), whose sum is σ = 9606654252. Its totient is φ = 3196487376.

The previous prime is 6398705437. The next prime is 6398705459. The reversal of 6398705458 is 8545078936.

It can be written as a sum of positive squares in 2 ways, for example, as 3989564569 + 2409140889 = 63163^2 + 49083^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 6398705399 and 6398705408.

It is not an unprimeable number, because it can be changed into a prime (6398705459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429885 + ... + 1434352.

Almost surely, 2^6398705458 is an apocalyptic number.

6398705458 is a deficient number, since it is larger than the sum of its proper divisors (3207948794).

6398705458 is a wasteful number, since it uses less digits than its factorization.

6398705458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865356.

The product of its (nonzero) digits is 7257600, while the sum is 55.

The square root of 6398705458 is about 79991.9087033182. The cubic root of 6398705458 is about 1856.5103430936.

The spelling of 6398705458 in words is "six billion, three hundred ninety-eight million, seven hundred five thousand, four hundred fifty-eight".