1393899636 has 24 divisors (see below), whose sum is σ = 3393843264. Its totient is φ = 444431680.

The previous prime is 1393899623. The next prime is 1393899743. The reversal of 1393899636 is 6369983931.

It is a congruent number.

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, 2524905 + ... + 2525456.

It is an arithmetic number, because the mean of its divisors is an integer number (141410136).

Almost surely, 2^1393899636 is an apocalyptic number.

It is an amenable number.

1393899636 is an abundant number, since it is smaller than the sum of its proper divisors (1999943628).

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

1393899636 is a wasteful number, since it uses less digits than its factorization.

1393899636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050391 (or 5050389 counting only the distinct ones).

The product of its digits is 5668704, while the sum is 57.

The square root of 1393899636 is about 37334.9653274246. The cubic root of 1393899636 is about 1117.0617168317.

The spelling of 1393899636 in words is "one billion, three hundred ninety-three million, eight hundred ninety-nine thousand, six hundred thirty-six".