1396993635 has 84 divisors (see below), whose sum is σ = 2580127056. Its totient is φ = 725734080.

The previous prime is 1396993613. The next prime is 1396993679. The reversal of 1396993635 is 5363996931.

It is a happy number.

It is not a de Polignac number, because 1396993635 - 2²⁴ = 1380216419 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 13562994 + ... + 13563096.

Almost surely, 2^1396993635 is an apocalyptic number.

1396993635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1396993635 is a deficient number, since it is larger than the sum of its proper divisors (1183133421).

1396993635 is an frugal number, since it uses more digits than its factorization.

1396993635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 172 counting only the distinct ones).

The product of its digits is 3542940, while the sum is 54.

The square root of 1396993635 is about 37376.3780347963. The cubic root of 1396993635 is about 1117.8876093359.

The spelling of 1396993635 in words is "one billion, three hundred ninety-six million, nine hundred ninety-three thousand, six hundred thirty-five".