129739820438 has 32 divisors (see below), whose sum is σ = 213400704000. Its totient is φ = 58927577760.

The previous prime is 129739820437. The next prime is 129739820447. The reversal of 129739820438 is 834028937921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129739820437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376808 + ... + 633611.

It is an arithmetic number, because the mean of its divisors is an integer number (6668772000).

Almost surely, 2^129739820438 is an apocalyptic number.

129739820438 is a deficient number, since it is larger than the sum of its proper divisors (83660883562).

129739820438 is a wasteful number, since it uses less digits than its factorization.

129739820438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010580.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 129739820438 in words is "one hundred twenty-nine billion, seven hundred thirty-nine million, eight hundred twenty thousand, four hundred thirty-eight".