129394704428 has 12 divisors (see below), whose sum is σ = 247026253992. Its totient is φ = 58815774720.

The previous prime is 129394704403. The next prime is 129394704431. The reversal of 129394704428 is 824407493921.

It is a self number, because there is not a number n which added to its sum of digits gives 129394704428.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1470394325 + ... + 1470394412.

It is an arithmetic number, because the mean of its divisors is an integer number (20585521166).

Almost surely, 2^129394704428 is an apocalyptic number.

It is an amenable number.

129394704428 is a deficient number, since it is larger than the sum of its proper divisors (117631549564).

129394704428 is a wasteful number, since it uses less digits than its factorization.

129394704428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940788752 (or 2940788750 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 129394704428 in words is "one hundred twenty-nine billion, three hundred ninety-four million, seven hundred four thousand, four hundred twenty-eight".