478238388 has 12 divisors (see below), whose sum is σ = 1115889600. Its totient is φ = 159412792.

The previous prime is 478238377. The next prime is 478238413. The reversal of 478238388 is 883832874.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×478238388³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 478238388.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19926588 + ... + 19926611.

It is an arithmetic number, because the mean of its divisors is an integer number (92990800).

Almost surely, 2^478238388 is an apocalyptic number.

It is an amenable number.

478238388 is an abundant number, since it is smaller than the sum of its proper divisors (637651212).

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

478238388 is a wasteful number, since it uses less digits than its factorization.

478238388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39853206 (or 39853204 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 51.

The square root of 478238388 is about 21868.6622361771. The cubic root of 478238388 is about 782.0145099272.

The spelling of 478238388 in words is "four hundred seventy-eight million, two hundred thirty-eight thousand, three hundred eighty-eight".