129782938 has 8 divisors (see below), whose sum is σ = 197138880. Its totient is φ = 64069980.

The previous prime is 129782923. The next prime is 129782963. The reversal of 129782938 is 839287921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×129782938² = 33687221991823688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129782891 and 129782900.

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, 410548 + ... + 410863.

It is an arithmetic number, because the mean of its divisors is an integer number (24642360).

Almost surely, 2^129782938 is an apocalyptic number.

129782938 is a deficient number, since it is larger than the sum of its proper divisors (67355942).

129782938 is an equidigital number, since it uses as much as digits as its factorization.

129782938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821492.

The product of its digits is 435456, while the sum is 49.

The square root of 129782938 is about 11392.2314758786. The cubic root of 129782938 is about 506.2975981665.

The spelling of 129782938 in words is "one hundred twenty-nine million, seven hundred eighty-two thousand, nine hundred thirty-eight".