478754257 has 4 divisors (see below), whose sum is σ = 479007216. Its totient is φ = 478501300.

The previous prime is 478754251. The next prime is 478754281. The reversal of 478754257 is 752457874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 478754257 - 2¹⁵ = 478721489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478754257.

It is not an unprimeable number, because it can be changed into a prime (478754251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123619 + ... + 127432.

It is an arithmetic number, because the mean of its divisors is an integer number (119751804).

Almost surely, 2^478754257 is an apocalyptic number.

It is an amenable number.

478754257 is a deficient number, since it is larger than the sum of its proper divisors (252959).

478754257 is a wasteful number, since it uses less digits than its factorization.

478754257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252958.

The product of its digits is 2195200, while the sum is 49.

The square root of 478754257 is about 21880.4537658614. The cubic root of 478754257 is about 782.2955915570.

The spelling of 478754257 in words is "four hundred seventy-eight million, seven hundred fifty-four thousand, two hundred fifty-seven".