129472736 has 24 divisors (see below), whose sum is σ = 255175200. Its totient is φ = 64666368.

The previous prime is 129472723. The next prime is 129472747. The reversal of 129472736 is 637274921.

It is a junction number, because it is equal to n+sod(n) for n = 129472693 and 129472702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40940 + ... + 43988.

It is an arithmetic number, because the mean of its divisors is an integer number (10632300).

Almost surely, 2^129472736 is an apocalyptic number.

129472736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129472736 is a deficient number, since it is larger than the sum of its proper divisors (125702464).

129472736 is a wasteful number, since it uses less digits than its factorization.

129472736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4386 (or 4378 counting only the distinct ones).

The product of its digits is 127008, while the sum is 41.

The square root of 129472736 is about 11378.6087022975. The cubic root of 129472736 is about 505.8938989210.

The spelling of 129472736 in words is "one hundred twenty-nine million, four hundred seventy-two thousand, seven hundred thirty-six".