180489428 has 12 divisors (see below), whose sum is σ = 360978912. Its totient is φ = 77352600.

The previous prime is 180489427. The next prime is 180489431. The reversal of 180489428 is 824984081.

It is a happy number.

180489428 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180489427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3222998 + ... + 3223053.

It is an arithmetic number, because the mean of its divisors is an integer number (30081576).

Almost surely, 2^180489428 is an apocalyptic number.

It is an amenable number.

180489428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

180489428 is a wasteful number, since it uses less digits than its factorization.

180489428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6446062 (or 6446060 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The square root of 180489428 is about 13434.6353876836. The cubic root of 180489428 is about 565.1328979672.

The spelling of 180489428 in words is "one hundred eighty million, four hundred eighty-nine thousand, four hundred twenty-eight".