1397578384 has 20 divisors (see below), whose sum is σ = 2715361920. Its totient is φ = 696839840.

The previous prime is 1397578379. The next prime is 1397578387. The reversal of 1397578384 is 4838757931.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1397578387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115912 + ... + 127399.

It is an arithmetic number, because the mean of its divisors is an integer number (135768096).

Almost surely, 2^1397578384 is an apocalyptic number.

It is an amenable number.

1397578384 is a deficient number, since it is larger than the sum of its proper divisors (1317783536).

1397578384 is a wasteful number, since it uses less digits than its factorization.

1397578384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243678 (or 243672 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 55.

The square root of 1397578384 is about 37384.1996570744. The cubic root of 1397578384 is about 1118.0435614846.

The spelling of 1397578384 in words is "one billion, three hundred ninety-seven million, five hundred seventy-eight thousand, three hundred eighty-four".