129878064 has 30 divisors (see below), whose sum is σ = 363478596. Its totient is φ = 43292640.

The previous prime is 129878059. The next prime is 129878081. The reversal of 129878064 is 460878921.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 450822 + ... + 451109.

Almost surely, 2^129878064 is an apocalyptic number.

It is an amenable number.

129878064 is an abundant number, since it is smaller than the sum of its proper divisors (233600532).

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

129878064 is a wasteful number, since it uses less digits than its factorization.

129878064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901945 (or 901936 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 129878064 is about 11396.4057491825. The cubic root of 129878064 is about 506.4212669730.

The spelling of 129878064 in words is "one hundred twenty-nine million, eight hundred seventy-eight thousand, sixty-four".