1398807922 has 16 divisors (see below), whose sum is σ = 2105556120. Its totient is φ = 696961408.

The previous prime is 1398807919. The next prime is 1398807983. The reversal of 1398807922 is 2297088931.

It can be written as a sum of positive squares in 4 ways, for example, as 1308196561 + 90611361 = 36169^2 + 9519^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094748 + ... + 1096024.

Almost surely, 2^1398807922 is an apocalyptic number.

1398807922 is a deficient number, since it is larger than the sum of its proper divisors (706748198).

1398807922 is a wasteful number, since it uses less digits than its factorization.

1398807922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 1398807922 is about 37400.6406629619. The cubic root of 1398807922 is about 1118.3713365674.

The spelling of 1398807922 in words is "one billion, three hundred ninety-eight million, eight hundred seven thousand, nine hundred twenty-two".