129882388 has 12 divisors (see below), whose sum is σ = 228288340. Its totient is φ = 64657152.

The previous prime is 129882373. The next prime is 129882391. The reversal of 129882388 is 883288921.

It can be written as a sum of positive squares in 2 ways, for example, as 89075844 + 40806544 = 9438^2 + 6388^2 .

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, 69981 + ... + 71812.

Almost surely, 2^129882388 is an apocalyptic number.

It is an amenable number.

129882388 is a deficient number, since it is larger than the sum of its proper divisors (98405952).

129882388 is a wasteful number, since it uses less digits than its factorization.

129882388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142026 (or 142024 counting only the distinct ones).

The product of its digits is 442368, while the sum is 49.

The square root of 129882388 is about 11396.5954565388. The cubic root of 129882388 is about 506.4268869655.

It can be divided in two parts, 12988 and 2388, that added together give a square (15376 = 124²).

The spelling of 129882388 in words is "one hundred twenty-nine million, eight hundred eighty-two thousand, three hundred eighty-eight".