129284887938 has 16 divisors (see below), whose sum is σ = 258595470336. Its totient is φ = 43090680240.

The previous prime is 129284887937. The next prime is 129284888011. The reversal of 129284887938 is 839788482921.

It is not an unprimeable number, because it can be changed into a prime (129284887937) 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, 1004881 + ... + 1126212.

It is an arithmetic number, because the mean of its divisors is an integer number (16162216896).

Almost surely, 2^129284887938 is an apocalyptic number.

129284887938 is an abundant number, since it is smaller than the sum of its proper divisors (129310582398).

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

129284887938 is a wasteful number, since it uses less digits than its factorization.

129284887938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141209.

The product of its digits is 111476736, while the sum is 69.

The spelling of 129284887938 in words is "one hundred twenty-nine billion, two hundred eighty-four million, eight hundred eighty-seven thousand, nine hundred thirty-eight".