478091722 has 4 divisors (see below), whose sum is σ = 717137586. Its totient is φ = 239045860.

The previous prime is 478091711. The next prime is 478091741. The reversal of 478091722 is 227190874.

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

It can be written as a sum of positive squares in only one way, i.e., 388050601 + 90041121 = 19699^2 + 9489^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119522929 + ... + 119522932.

Almost surely, 2^478091722 is an apocalyptic number.

478091722 is a deficient number, since it is larger than the sum of its proper divisors (239045864).

478091722 is a wasteful number, since it uses less digits than its factorization.

478091722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239045863.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 478091722 is about 21865.3086417732. The cubic root of 478091722 is about 781.9345590980.

The spelling of 478091722 in words is "four hundred seventy-eight million, ninety-one thousand, seven hundred twenty-two".