478297491 has 16 divisors (see below), whose sum is σ = 731172864. Its totient is φ = 272435904.

The previous prime is 478297453. The next prime is 478297511. The reversal of 478297491 is 194792874.

It is not a de Polignac number, because 478297491 - 2⁹ = 478296979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (478297291) 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, 29811 + ... + 42956.

It is an arithmetic number, because the mean of its divisors is an integer number (45698304).

Almost surely, 2^478297491 is an apocalyptic number.

478297491 is a deficient number, since it is larger than the sum of its proper divisors (252875373).

478297491 is a wasteful number, since it uses less digits than its factorization.

478297491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73090.

The product of its digits is 1016064, while the sum is 51.

The square root of 478297491 is about 21870.0135116556. The cubic root of 478297491 is about 782.0467236382.

The spelling of 478297491 in words is "four hundred seventy-eight million, two hundred ninety-seven thousand, four hundred ninety-one".