180226638 has 24 divisors (see below), whose sum is σ = 393951168. Its totient is φ = 59543232.

The previous prime is 180226637. The next prime is 180226649. The reversal of 180226638 is 836622081.

180226638 is a `hidden beast` number, since 18 + 0 + 2 + 2 + 6 + 638 = 666.

180226638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180226637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42270 + ... + 46337.

It is an arithmetic number, because the mean of its divisors is an integer number (16414632).

Almost surely, 2^180226638 is an apocalyptic number.

180226638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

180226638 is an abundant number, since it is smaller than the sum of its proper divisors (213724530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

180226638 is a wasteful number, since it uses less digits than its factorization.

180226638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88728 (or 88725 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 180226638 is about 13424.8515075587. The cubic root of 180226638 is about 564.8584896339.

The spelling of 180226638 in words is "one hundred eighty million, two hundred twenty-six thousand, six hundred thirty-eight".