1393690394 has 8 divisors (see below), whose sum is σ = 2200563840. Its totient is φ = 660169116.

The previous prime is 1393690393. The next prime is 1393690457. The reversal of 1393690394 is 4930963931.

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

It is not an unprimeable number, because it can be changed into a prime (1393690393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18337994 + ... + 18338069.

It is an arithmetic number, because the mean of its divisors is an integer number (275070480).

Almost surely, 2^1393690394 is an apocalyptic number.

1393690394 is a deficient number, since it is larger than the sum of its proper divisors (806873446).

1393690394 is a wasteful number, since it uses less digits than its factorization.

1393690394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36676084.

The product of its (nonzero) digits is 472392, while the sum is 47.

The square root of 1393690394 is about 37332.1629965369. The cubic root of 1393690394 is about 1117.0058189946.

The spelling of 1393690394 in words is "one billion, three hundred ninety-three million, six hundred ninety thousand, three hundred ninety-four".