1393835868 has 36 divisors (see below), whose sum is σ = 3567913440. Its totient is φ = 458729856.

The previous prime is 1393835837. The next prime is 1393835869. The reversal of 1393835868 is 8685383931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393835869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242205 + ... + 247892.

Almost surely, 2^1393835868 is an apocalyptic number.

1393835868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1393835868 is an abundant number, since it is smaller than the sum of its proper divisors (2174077572).

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

1393835868 is a wasteful number, since it uses less digits than its factorization.

1393835868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490186 (or 490181 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 1393835868 is about 37334.1113192748. Note that the first 3 decimals coincide. The cubic root of 1393835868 is about 1117.0446821576.

The spelling of 1393835868 in words is "one billion, three hundred ninety-three million, eight hundred thirty-five thousand, eight hundred sixty-eight".