180649428 has 24 divisors (see below), whose sum is σ = 423044832. Its totient is φ = 59997984.

The previous prime is 180649423. The next prime is 180649451. The reversal of 180649428 is 824946081.

It is a self number, because there is not a number n which added to its sum of digits gives 180649428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180649423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23850 + ... + 30497.

It is an arithmetic number, because the mean of its divisors is an integer number (17626868).

Almost surely, 2^180649428 is an apocalyptic number.

It is an amenable number.

180649428 is an abundant number, since it is smaller than the sum of its proper divisors (242395404).

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

180649428 is a wasteful number, since it uses less digits than its factorization.

180649428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54631 (or 54629 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 180649428 is about 13440.5888263870. The cubic root of 180649428 is about 565.2998413703.

The spelling of 180649428 in words is "one hundred eighty million, six hundred forty-nine thousand, four hundred twenty-eight".