478937889 has 48 divisors (see below), whose sum is σ = 750336912. Its totient is φ = 293289984.

The previous prime is 478937881. The next prime is 478937891. The reversal of 478937889 is 988739874.

478937889 is a `hidden beast` number, since 478 + 93 + 78 + 8 + 9 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 7700625 + 471237264 = 2775^2 + 21708^2 .

It is not a de Polignac number, because 478937889 - 2³ = 478937881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (478937881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1529997 + ... + 1530309.

It is an arithmetic number, because the mean of its divisors is an integer number (15632019).

Almost surely, 2^478937889 is an apocalyptic number.

It is an amenable number.

478937889 is a deficient number, since it is larger than the sum of its proper divisors (271399023).

478937889 is a wasteful number, since it uses less digits than its factorization.

478937889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 543 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The square root of 478937889 is about 21884.6496202247. The cubic root of 478937889 is about 782.3955984249.

The spelling of 478937889 in words is "four hundred seventy-eight million, nine hundred thirty-seven thousand, eight hundred eighty-nine".