180226478 has 4 divisors (see below), whose sum is σ = 270339720. Its totient is φ = 90113238.

The previous prime is 180226463. The next prime is 180226483. The reversal of 180226478 is 874622081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874622081 = 23 ⋅38027047.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45056618 + ... + 45056621.

It is an arithmetic number, because the mean of its divisors is an integer number (67584930).

Almost surely, 2^180226478 is an apocalyptic number.

180226478 is a deficient number, since it is larger than the sum of its proper divisors (90113242).

180226478 is an equidigital number, since it uses as much as digits as its factorization.

180226478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90113241.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 180226478 is about 13424.8455484598. The cubic root of 180226478 is about 564.8583224788.

The spelling of 180226478 in words is "one hundred eighty million, two hundred twenty-six thousand, four hundred seventy-eight".