1398398768 has 20 divisors (see below), whose sum is σ = 2917813248. Its totient is φ = 645414720.

The previous prime is 1398398759. The next prime is 1398398773. The reversal of 1398398768 is 8678938931.

It is a super-2 number, since 2×1398398768² = 3911038228687835648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1398398768.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3361328 + ... + 3361743.

Almost surely, 2^1398398768 is an apocalyptic number.

It is an amenable number.

1398398768 is an abundant number, since it is smaller than the sum of its proper divisors (1519414480).

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

1398398768 is a wasteful number, since it uses less digits than its factorization.

1398398768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6723092 (or 6723086 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 62.

The square root of 1398398768 is about 37395.1703833530. The cubic root of 1398398768 is about 1118.2622840137.

The spelling of 1398398768 in words is "one billion, three hundred ninety-eight million, three hundred ninety-eight thousand, seven hundred sixty-eight".