129478926 has 8 divisors (see below), whose sum is σ = 258957864. Its totient is φ = 43159640.

The previous prime is 129478883. The next prime is 129478927. The reversal of 129478926 is 629874921.

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

129478926 is an admirable number.

It is a super-2 number, since 2×129478926² = 33529584556226952, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129478927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10789905 + ... + 10789916.

It is an arithmetic number, because the mean of its divisors is an integer number (32369733).

Almost surely, 2^129478926 is an apocalyptic number.

129478926 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129478926 is a wasteful number, since it uses less digits than its factorization.

129478926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21579826.

The product of its digits is 435456, while the sum is 48.

The square root of 129478926 is about 11378.8807006665. The cubic root of 129478926 is about 505.9019609358.

The spelling of 129478926 in words is "one hundred twenty-nine million, four hundred seventy-eight thousand, nine hundred twenty-six".