478265657 has 4 divisors (see below), whose sum is σ = 499059840. Its totient is φ = 457471476.

The previous prime is 478265639. The next prime is 478265659. The reversal of 478265657 is 756562874.

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 478265657 - 2¹⁴ = 478249273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478265659) 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, 10397057 + ... + 10397102.

It is an arithmetic number, because the mean of its divisors is an integer number (124764960).

Almost surely, 2^478265657 is an apocalyptic number.

It is an amenable number.

478265657 is a deficient number, since it is larger than the sum of its proper divisors (20794183).

478265657 is a wasteful number, since it uses less digits than its factorization.

478265657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20794182.

The product of its digits is 2822400, while the sum is 50.

The square root of 478265657 is about 21869.2856993547. The cubic root of 478265657 is about 782.0293730504.

The spelling of 478265657 in words is "four hundred seventy-eight million, two hundred sixty-five thousand, six hundred fifty-seven".