1380431698 has 8 divisors (see below), whose sum is σ = 2070944892. Its totient is φ = 690116736.

The previous prime is 1380431677. The next prime is 1380431713. The reversal of 1380431698 is 8961340831.

It can be written as a sum of positive squares in 2 ways, for example, as 1278563049 + 101868649 = 35757^2 + 10093^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30715 + ... + 60862.

Almost surely, 2^1380431698 is an apocalyptic number.

1380431698 is a deficient number, since it is larger than the sum of its proper divisors (690513194).

1380431698 is an equidigital number, since it uses as much as digits as its factorization.

1380431698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99116.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1380431698 is about 37154.1612474296. The cubic root of 1380431698 is about 1113.4523624238.

The spelling of 1380431698 in words is "one billion, three hundred eighty million, four hundred thirty-one thousand, six hundred ninety-eight".