129157392 has 80 divisors (see below), whose sum is σ = 410668160. Its totient is φ = 34062336.

The previous prime is 129157333. The next prime is 129157393. The reversal of 129157392 is 293751921.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 129157392.

It is not an unprimeable number, because it can be changed into a prime (129157393) 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, 10417 + ... + 19152.

It is an arithmetic number, because the mean of its divisors is an integer number (5133352).

Almost surely, 2^129157392 is an apocalyptic number.

129157392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129157392 is an abundant number, since it is smaller than the sum of its proper divisors (281510768).

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

129157392 is a wasteful number, since it uses less digits than its factorization.

129157392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29600 (or 29594 counting only the distinct ones).

The product of its digits is 34020, while the sum is 39.

The square root of 129157392 is about 11364.7433758972. The cubic root of 129157392 is about 505.4828463607.

The spelling of 129157392 in words is "one hundred twenty-nine million, one hundred fifty-seven thousand, three hundred ninety-two".