478138287 has 32 divisors (see below), whose sum is σ = 734987520. Its totient is φ = 273438720.

The previous prime is 478138273. The next prime is 478138291. The reversal of 478138287 is 782831874.

It is a happy number.

It is not a de Polignac number, because 478138287 - 2⁶ = 478138223 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478138217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172303 + ... + 175055.

It is an arithmetic number, because the mean of its divisors is an integer number (22968360).

Almost surely, 2^478138287 is an apocalyptic number.

478138287 is a deficient number, since it is larger than the sum of its proper divisors (256849233).

478138287 is a wasteful number, since it uses less digits than its factorization.

478138287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063.

The product of its digits is 602112, while the sum is 48.

The square root of 478138287 is about 21866.3734304525. The cubic root of 478138287 is about 781.9599444644.

The spelling of 478138287 in words is "four hundred seventy-eight million, one hundred thirty-eight thousand, two hundred eighty-seven".