478728077 has 4 divisors (see below), whose sum is σ = 483663516. Its totient is φ = 473792640.

The previous prime is 478728067. The next prime is 478728101. The reversal of 478728077 is 770827874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 770827874 = 2 ⋅385413937.

It can be written as a sum of positive squares in 2 ways, for example, as 391604521 + 87123556 = 19789^2 + 9334^2 .

It is a cyclic number.

It is not a de Polignac number, because 478728077 - 2²⁴ = 461950861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478728017) 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, 2467574 + ... + 2467767.

It is an arithmetic number, because the mean of its divisors is an integer number (120915879).

Almost surely, 2^478728077 is an apocalyptic number.

It is an amenable number.

478728077 is a deficient number, since it is larger than the sum of its proper divisors (4935439).

478728077 is an equidigital number, since it uses as much as digits as its factorization.

478728077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4935438.

The product of its (nonzero) digits is 1229312, while the sum is 50.

The square root of 478728077 is about 21879.8555068355. The cubic root of 478728077 is about 782.2813317208.

The spelling of 478728077 in words is "four hundred seventy-eight million, seven hundred twenty-eight thousand, seventy-seven".