129722390 has 16 divisors (see below), whose sum is σ = 266857632. Its totient is φ = 44476224.

The previous prime is 129722371. The next prime is 129722419. The reversal of 129722390 is 93227921.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 129722390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926519 + ... + 926658.

It is an arithmetic number, because the mean of its divisors is an integer number (16678602).

Almost surely, 2^129722390 is an apocalyptic number.

129722390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129722390 is an abundant number, since it is smaller than the sum of its proper divisors (137135242).

129722390 is a wasteful number, since it uses less digits than its factorization.

129722390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853191.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 129722390 is about 11389.5737409264. The cubic root of 129722390 is about 506.2188511039.

The spelling of 129722390 in words is "one hundred twenty-nine million, seven hundred twenty-two thousand, three hundred ninety".