129791478 has 16 divisors (see below), whose sum is σ = 259694640. Its totient is φ = 43245216.

The previous prime is 129791477. The next prime is 129791483. The reversal of 129791478 is 874197921.

It is a super-2 number, since 2×129791478² = 33691655522848968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129791477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24708 + ... + 29496.

It is an arithmetic number, because the mean of its divisors is an integer number (16230915).

Almost surely, 2^129791478 is an apocalyptic number.

129791478 is an abundant number, since it is smaller than the sum of its proper divisors (129903162).

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

129791478 is a wasteful number, since it uses less digits than its factorization.

129791478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9311.

The product of its digits is 254016, while the sum is 48.

The square root of 129791478 is about 11392.6062865351. The cubic root of 129791478 is about 506.3087030845.

The spelling of 129791478 in words is "one hundred twenty-nine million, seven hundred ninety-one thousand, four hundred seventy-eight".