180478 has 4 divisors (see below), whose sum is σ = 270720. Its totient is φ = 90238.

The previous prime is 180473. The next prime is 180491. The reversal of 180478 is 874081.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45118 + ... + 45121.

It is an arithmetic number, because the mean of its divisors is an integer number (67680).

2¹⁸⁰⁴⁷⁸ is an apocalyptic number.

180478 is a deficient number, since it is larger than the sum of its proper divisors (90242).

180478 is an equidigital number, since it uses as much as digits as its factorization.

180478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90241.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 180478 is about 424.8270236226. The cubic root of 180478 is about 56.5120970260.

The spelling of 180478 in words is "one hundred eighty thousand, four hundred seventy-eight".