129783284 has 12 divisors (see below), whose sum is σ = 229462884. Its totient is φ = 64222464.

The previous prime is 129783263. The next prime is 129783289. The reversal of 129783284 is 482387921.

It can be written as a sum of positive squares in 2 ways, for example, as 24720784 + 105062500 = 4972^2 + 10250^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129783289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166859 + ... + 167634.

It is an arithmetic number, because the mean of its divisors is an integer number (19121907).

Almost surely, 2^129783284 is an apocalyptic number.

It is an amenable number.

129783284 is a deficient number, since it is larger than the sum of its proper divisors (99679600).

129783284 is a wasteful number, since it uses less digits than its factorization.

129783284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334594 (or 334592 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 129783284 is about 11392.2466616555. The cubic root of 129783284 is about 506.2980480942.

The spelling of 129783284 in words is "one hundred twenty-nine million, seven hundred eighty-three thousand, two hundred eighty-four".