129970992 has 40 divisors (see below), whose sum is σ = 341270320. Its totient is φ = 42612480.

The previous prime is 129970957. The next prime is 129970993. The reversal of 129970992 is 299079921.

It is a super-2 number, since 2×129970992² = 33784917522928128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (129970993) 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, 19267 + ... + 25122.

It is an arithmetic number, because the mean of its divisors is an integer number (8531758).

Almost surely, 2^129970992 is an apocalyptic number.

129970992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129970992 is an abundant number, since it is smaller than the sum of its proper divisors (211299328).

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

129970992 is a wasteful number, since it uses less digits than its factorization.

129970992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44461 (or 44455 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 48.

The square root of 129970992 is about 11400.4820950695. The cubic root of 129970992 is about 506.5420199687.

The spelling of 129970992 in words is "one hundred twenty-nine million, nine hundred seventy thousand, nine hundred ninety-two".