478565397 has 24 divisors (see below), whose sum is σ = 696949344. Its totient is φ = 316432224.

The previous prime is 478565291. The next prime is 478565411. The reversal of 478565397 is 793565874.

478565397 is a `hidden beast` number, since 4 + 78 + 565 + 3 + 9 + 7 = 666.

It is not a de Polignac number, because 478565397 - 2¹⁴ = 478549013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478565497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 914778 + ... + 915300.

It is an arithmetic number, because the mean of its divisors is an integer number (29039556).

Almost surely, 2^478565397 is an apocalyptic number.

It is an amenable number.

478565397 is a deficient number, since it is larger than the sum of its proper divisors (218383947).

478565397 is a wasteful number, since it uses less digits than its factorization.

478565397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169 (or 1166 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The square root of 478565397 is about 21876.1376161332. The cubic root of 478565397 is about 782.1927108167.

The spelling of 478565397 in words is "four hundred seventy-eight million, five hundred sixty-five thousand, three hundred ninety-seven".