478139904 has 120 divisors (see below), whose sum is σ = 1505553192. Its totient is φ = 144875520.

The previous prime is 478139897. The next prime is 478139911. The reversal of 478139904 is 409931874.

It is an interprime number because it is at equal distance from previous prime (478139897) and next prime (478139911).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 478139904.

It is a congruent number.

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, 45972 + ... + 55404.

Almost surely, 2^478139904 is an apocalyptic number.

478139904 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 478139904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (752776596).

478139904 is an abundant number, since it is smaller than the sum of its proper divisors (1027413288).

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

478139904 is a wasteful number, since it uses less digits than its factorization.

478139904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9468 (or 9449 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 478139904 is about 21866.4104050025. The cubic root of 478139904 is about 781.9608259582.

The spelling of 478139904 in words is "four hundred seventy-eight million, one hundred thirty-nine thousand, nine hundred four".