129468978 has 24 divisors (see below), whose sum is σ = 292713408. Its totient is φ = 41279832.

The previous prime is 129468949. The next prime is 129469009. The reversal of 129468978 is 879864921.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155950 + ... + 156777.

It is an arithmetic number, because the mean of its divisors is an integer number (12196392).

Almost surely, 2^129468978 is an apocalyptic number.

129468978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

129468978 is an abundant number, since it is smaller than the sum of its proper divisors (163244430).

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

129468978 is a wasteful number, since it uses less digits than its factorization.

129468978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312758 (or 312755 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 129468978 is about 11378.4435666747. The cubic root of 129468978 is about 505.8890042800.

The spelling of 129468978 in words is "one hundred twenty-nine million, four hundred sixty-eight thousand, nine hundred seventy-eight".