1398378704 has 20 divisors (see below), whose sum is σ = 2713381764. Its totient is φ = 698151168.

The previous prime is 1398378643. The next prime is 1398378713. The reversal of 1398378704 is 4078738931.

It can be written as a sum of positive squares in 2 ways, for example, as 1035552400 + 362826304 = 32180^2 + 19048^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53717 + ... + 75380.

Almost surely, 2^1398378704 is an apocalyptic number.

It is an amenable number.

1398378704 is a deficient number, since it is larger than the sum of its proper divisors (1315003060).

1398378704 is a wasteful number, since it uses less digits than its factorization.

1398378704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129782 (or 129776 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 1398378704 is about 37394.9021124538. The cubic root of 1398378704 is about 1118.2569357725.

The spelling of 1398378704 in words is "one billion, three hundred ninety-eight million, three hundred seventy-eight thousand, seven hundred four".