1396439604 has 36 divisors (see below), whose sum is σ = 4034159584. Its totient is φ = 398982672.

The previous prime is 1396439579. The next prime is 1396439621. The reversal of 1396439604 is 4069346931.

1396439604 is a `hidden beast` number, since 1 + 3 + 9 + 6 + 4 + 39 + 604 = 666.

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

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1396439604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2770462 + ... + 2770965.

Almost surely, 2^1396439604 is an apocalyptic number.

1396439604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1396439604 is an abundant number, since it is smaller than the sum of its proper divisors (2637719980).

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

1396439604 is a wasteful number, since it uses less digits than its factorization.

1396439604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5541444 (or 5541439 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 1396439604 is about 37368.9657871341. The cubic root of 1396439604 is about 1117.7398095017.

The spelling of 1396439604 in words is "one billion, three hundred ninety-six million, four hundred thirty-nine thousand, six hundred four".