129995392 has 32 divisors (see below), whose sum is σ = 263236500. Its totient is φ = 63928320.

The previous prime is 129995387. The next prime is 129995399. The reversal of 129995392 is 293599921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 126697536 + 3297856 = 11256^2 + 1816^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (129995399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517 + ... + 16132.

Almost surely, 2^129995392 is an apocalyptic number.

It is an amenable number.

129995392 is an abundant number, since it is smaller than the sum of its proper divisors (133241108).

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

129995392 is an equidigital number, since it uses as much as digits as its factorization.

129995392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16724 (or 16712 counting only the distinct ones).

The product of its digits is 393660, while the sum is 49.

The square root of 129995392 is about 11401.5521750330. The cubic root of 129995392 is about 506.5737164054.

The spelling of 129995392 in words is "one hundred twenty-nine million, nine hundred ninety-five thousand, three hundred ninety-two".