2139744434 has 16 divisors (see below), whose sum is σ = 3318796800. Its totient is φ = 1033596480.

The previous prime is 2139744433. The next prime is 2139744539. The reversal of 2139744434 is 4344479312.

It is a junction number, because it is equal to n+sod(n) for n = 2139744391 and 2139744400.

It is not an unprimeable number, because it can be changed into a prime (2139744433) 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, 7667 + ... + 65865.

It is an arithmetic number, because the mean of its divisors is an integer number (207424800).

Almost surely, 2^2139744434 is an apocalyptic number.

2139744434 is a deficient number, since it is larger than the sum of its proper divisors (1179052366).

2139744434 is a wasteful number, since it uses less digits than its factorization.

2139744434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58825.

The product of its digits is 290304, while the sum is 41.

The square root of 2139744434 is about 46257.3716719833. The cubic root of 2139744434 is about 1288.6074418456.

The spelling of 2139744434 in words is "two billion, one hundred thirty-nine million, seven hundred forty-four thousand, four hundred thirty-four".