978448129 has 8 divisors (see below), whose sum is σ = 1030027392. Its totient is φ = 927622080.

The previous prime is 978448117. The next prime is 978448169. The reversal of 978448129 is 921844879.

It is a happy number.

978448129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978448129 is a prime.

It is a super-2 number, since 2×978448129² = 1914721482287201282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978448169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185637 + ... + 190834.

It is an arithmetic number, because the mean of its divisors is an integer number (128753424).

Almost surely, 2^978448129 is an apocalyptic number.

It is an amenable number.

978448129 is a deficient number, since it is larger than the sum of its proper divisors (51579263).

978448129 is a wasteful number, since it uses less digits than its factorization.

978448129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376607.

The product of its digits is 1161216, while the sum is 52.

The square root of 978448129 is about 31280.1555143193. The cubic root of 978448129 is about 992.7638068098.

The spelling of 978448129 in words is "nine hundred seventy-eight million, four hundred forty-eight thousand, one hundred twenty-nine".