478129878 has 40 divisors (see below), whose sum is σ = 1082445672. Its totient is φ = 157728384.

The previous prime is 478129877. The next prime is 478129891. The reversal of 478129878 is 878921874.

It is a happy number.

478129878 is a `hidden beast` number, since 478 + 12 + 98 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478129877) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 501 + ... + 30927.

Almost surely, 2^478129878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 478129878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (541222836).

478129878 is an abundant number, since it is smaller than the sum of its proper divisors (604315794).

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

478129878 is a wasteful number, since it uses less digits than its factorization.

478129878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30538 (or 30529 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 478129878 is about 21866.1811480652. The cubic root of 478129878 is about 781.9553603376.

The spelling of 478129878 in words is "four hundred seventy-eight million, one hundred twenty-nine thousand, eight hundred seventy-eight".