1398376819 has 16 divisors (see below), whose sum is σ = 1616613120. Its totient is φ = 1184839200.

The previous prime is 1398376817. The next prime is 1398376829. The reversal of 1398376819 is 9186738931.

It is a cyclic number.

It is not a de Polignac number, because 1398376819 - 2¹ = 1398376817 is a prime.

It is a super-2 number, since 2×1398376819² = 3910915455833117522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1398376819.

It is not an unprimeable number, because it can be changed into a prime (1398376817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213544 + ... + 219994.

It is an arithmetic number, because the mean of its divisors is an integer number (101038320).

Almost surely, 2^1398376819 is an apocalyptic number.

1398376819 is a deficient number, since it is larger than the sum of its proper divisors (218236301).

1398376819 is a wasteful number, since it uses less digits than its factorization.

1398376819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6810.

The product of its digits is 1959552, while the sum is 55.

The square root of 1398376819 is about 37394.8769084750. The cubic root of 1398376819 is about 1118.2564333060.

The spelling of 1398376819 in words is "one billion, three hundred ninety-eight million, three hundred seventy-six thousand, eight hundred nineteen".