129773428 has 12 divisors (see below), whose sum is σ = 228497920. Its totient is φ = 64488312.

The previous prime is 129773419. The next prime is 129773431. The reversal of 129773428 is 824377921.

It is a super-2 number, since 2×129773428² = 33682285229742368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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, 98868 + ... + 100171.

Almost surely, 2^129773428 is an apocalyptic number.

It is an amenable number.

129773428 is a deficient number, since it is larger than the sum of its proper divisors (98724492).

129773428 is a wasteful number, since it uses less digits than its factorization.

129773428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199206 (or 199204 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 129773428 is about 11391.8140785390. The cubic root of 129773428 is about 506.2852313438.

The spelling of 129773428 in words is "one hundred twenty-nine million, seven hundred seventy-three thousand, four hundred twenty-eight".