1389434994 has 24 divisors (see below), whose sum is σ = 3033428112. Its totient is φ = 459608760.

The previous prime is 1389434953. The next prime is 1389434999. The reversal of 1389434994 is 4994349831.

It is a self number, because there is not a number n which added to its sum of digits gives 1389434994.

It is not an unprimeable number, because it can be changed into a prime (1389434999) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 292264 + ... + 296979.

It is an arithmetic number, because the mean of its divisors is an integer number (126392838).

Almost surely, 2^1389434994 is an apocalyptic number.

1389434994 is an abundant number, since it is smaller than the sum of its proper divisors (1643993118).

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

1389434994 is a wasteful number, since it uses less digits than its factorization.

1389434994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589382 (or 589379 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 1389434994 is about 37275.1256738324. The cubic root of 1389434994 is about 1115.8677966107.

The spelling of 1389434994 in words is "one billion, three hundred eighty-nine million, four hundred thirty-four thousand, nine hundred ninety-four".