1380694858 has 4 divisors (see below), whose sum is σ = 2071042290. Its totient is φ = 690347428.

The previous prime is 1380694829. The next prime is 1380694871. The reversal of 1380694858 is 8584960831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8584960831 = 647 ⋅13268873.

It can be written as a sum of positive squares in only one way, i.e., 1315295289 + 65399569 = 36267^2 + 8087^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345173713 + ... + 345173716.

Almost surely, 2^1380694858 is an apocalyptic number.

1380694858 is a deficient number, since it is larger than the sum of its proper divisors (690347432).

1380694858 is an equidigital number, since it uses as much as digits as its factorization.

1380694858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690347431.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The square root of 1380694858 is about 37157.7025393121. The cubic root of 1380694858 is about 1113.5231126358.

The spelling of 1380694858 in words is "one billion, three hundred eighty million, six hundred ninety-four thousand, eight hundred fifty-eight".