478765057 has 4 divisors (see below), whose sum is σ = 480751876. Its totient is φ = 476778240.

The previous prime is 478765037. The next prime is 478765081. The reversal of 478765057 is 750567874.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 440622081 + 38142976 = 20991^2 + 6176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478765057 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 478765057.

It is not an unprimeable number, because it can be changed into a prime (478765037) 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, 993048 + ... + 993529.

It is an arithmetic number, because the mean of its divisors is an integer number (120187969).

Almost surely, 2^478765057 is an apocalyptic number.

It is an amenable number.

478765057 is a deficient number, since it is larger than the sum of its proper divisors (1986819).

478765057 is a wasteful number, since it uses less digits than its factorization.

478765057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986818.

The product of its (nonzero) digits is 1646400, while the sum is 49.

The square root of 478765057 is about 21880.7005600826. The cubic root of 478765057 is about 782.3014739965.

The spelling of 478765057 in words is "four hundred seventy-eight million, seven hundred sixty-five thousand, fifty-seven".