129692040 has 32 divisors (see below), whose sum is σ = 389076480. Its totient is φ = 34584512.

The previous prime is 129692029. The next prime is 129692041. The reversal of 129692040 is 40296921.

It is a junction number, because it is equal to n+sod(n) for n = 129691992 and 129692010.

It is not an unprimeable number, because it can be changed into a prime (129692041) 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, 540264 + ... + 540503.

It is an arithmetic number, because the mean of its divisors is an integer number (12158640).

Almost surely, 2^129692040 is an apocalyptic number.

129692040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129692040 is an abundant number, since it is smaller than the sum of its proper divisors (259384440).

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

129692040 is a wasteful number, since it uses less digits than its factorization.

129692040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080781 (or 1080777 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 129692040 is about 11388.2413040820. The cubic root of 129692040 is about 506.1793695092.

The spelling of 129692040 in words is "one hundred twenty-nine million, six hundred ninety-two thousand, forty".