1397839538 has 16 divisors (see below), whose sum is σ = 2278314240. Its totient is φ = 640774800.

The previous prime is 1397839537. The next prime is 1397839591. The reversal of 1397839538 is 8359387931.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1397839537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592133 + ... + 594488.

It is an arithmetic number, because the mean of its divisors is an integer number (142394640).

Almost surely, 2^1397839538 is an apocalyptic number.

1397839538 is a deficient number, since it is larger than the sum of its proper divisors (880474702).

1397839538 is a wasteful number, since it uses less digits than its factorization.

1397839538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186673.

The product of its digits is 4898880, while the sum is 56.

The square root of 1397839538 is about 37387.6923331730. The cubic root of 1397839538 is about 1118.1131970215.

The spelling of 1397839538 in words is "one billion, three hundred ninety-seven million, eight hundred thirty-nine thousand, five hundred thirty-eight".