478758644 has 48 divisors (see below), whose sum is σ = 1044288000. Its totient is φ = 186990336.

The previous prime is 478758619. The next prime is 478758647. The reversal of 478758644 is 446857874.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478758647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20432 + ... + 37080.

It is an arithmetic number, because the mean of its divisors is an integer number (21756000).

Almost surely, 2^478758644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 478758644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522144000).

478758644 is an abundant number, since it is smaller than the sum of its proper divisors (565529356).

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

478758644 is a wasteful number, since it uses less digits than its factorization.

478758644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16752 (or 16750 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 53.

The square root of 478758644 is about 21880.5540149238. The cubic root of 478758644 is about 782.2979810364.

The spelling of 478758644 in words is "four hundred seventy-eight million, seven hundred fifty-eight thousand, six hundred forty-four".