478718457 has 32 divisors (see below), whose sum is σ = 756545280. Its totient is φ = 263450880.

The previous prime is 478718447. The next prime is 478718483. The reversal of 478718457 is 754817874.

It is not a de Polignac number, because 478718457 - 2⁷ = 478718329 is a prime.

It is a super-2 number, since 2×478718457² = 458342722144921698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (478718437) 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, 328743 + ... + 330195.

It is an arithmetic number, because the mean of its divisors is an integer number (23642040).

Almost surely, 2^478718457 is an apocalyptic number.

It is an amenable number.

478718457 is a deficient number, since it is larger than the sum of its proper divisors (277826823).

478718457 is a wasteful number, since it uses less digits than its factorization.

478718457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033.

The product of its digits is 1756160, while the sum is 51.

The square root of 478718457 is about 21879.6356688131. The cubic root of 478718457 is about 782.2760917267.

The spelling of 478718457 in words is "four hundred seventy-eight million, seven hundred eighteen thousand, four hundred fifty-seven".