129916326 has 32 divisors (see below), whose sum is σ = 265200480. Its totient is φ = 42420224.

The previous prime is 129916321. The next prime is 129916333. The reversal of 129916326 is 623619921.

It is a super-2 number, since 2×129916326² = 33756503522676552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129916321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59266 + ... + 61418.

It is an arithmetic number, because the mean of its divisors is an integer number (8287515).

Almost surely, 2^129916326 is an apocalyptic number.

129916326 is an abundant number, since it is smaller than the sum of its proper divisors (135284154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129916326 is a wasteful number, since it uses less digits than its factorization.

129916326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360.

The product of its digits is 34992, while the sum is 39.

The square root of 129916326 is about 11398.0843127255. The cubic root of 129916326 is about 506.4709925577.

The spelling of 129916326 in words is "one hundred twenty-nine million, nine hundred sixteen thousand, three hundred twenty-six".