1393675638 has 16 divisors (see below), whose sum is σ = 2789406720. Its totient is φ = 464215976.

The previous prime is 1393675637. The next prime is 1393675663. The reversal of 1393675638 is 8365763931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393675637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76758 + ... + 93161.

It is an arithmetic number, because the mean of its divisors is an integer number (174337920).

Almost surely, 2^1393675638 is an apocalyptic number.

1393675638 is an abundant number, since it is smaller than the sum of its proper divisors (1395731082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1393675638 is a wasteful number, since it uses less digits than its factorization.

1393675638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171291.

The product of its digits is 2449440, while the sum is 51.

The square root of 1393675638 is about 37331.9653648184. The cubic root of 1393675638 is about 1117.0018768000.

The spelling of 1393675638 in words is "one billion, three hundred ninety-three million, six hundred seventy-five thousand, six hundred thirty-eight".