1399539842 has 16 divisors (see below), whose sum is σ = 2115659040. Its totient is φ = 694334592.

The previous prime is 1399539839. The next prime is 1399539853. The reversal of 1399539842 is 2489359931.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216209 + ... + 222587.

It is an arithmetic number, because the mean of its divisors is an integer number (132228690).

Almost surely, 2^1399539842 is an apocalyptic number.

1399539842 is a deficient number, since it is larger than the sum of its proper divisors (716119198).

1399539842 is a wasteful number, since it uses less digits than its factorization.

1399539842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7217.

The product of its digits is 2099520, while the sum is 53.

The square root of 1399539842 is about 37410.4242424488. The cubic root of 1399539842 is about 1118.5663634919.

The spelling of 1399539842 in words is "one billion, three hundred ninety-nine million, five hundred thirty-nine thousand, eight hundred forty-two".