180428 has 12 divisors (see below), whose sum is σ = 323400. Its totient is φ = 88032.

The previous prime is 180419. The next prime is 180437. The reversal of 180428 is 824081.

It is an interprime number because it is at equal distance from previous prime (180419) and next prime (180437).

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

180428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353 + ... + 696.

It is an arithmetic number, because the mean of its divisors is an integer number (26950).

2¹⁸⁰⁴²⁸ is an apocalyptic number.

It is an amenable number.

180428 is a deficient number, since it is larger than the sum of its proper divisors (142972).

180428 is a wasteful number, since it uses less digits than its factorization.

180428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 180428 is about 424.7681720657. The cubic root of 180428 is about 56.5068778011.

The spelling of 180428 in words is "one hundred eighty thousand, four hundred twenty-eight".