401800180 has 24 divisors (see below), whose sum is σ = 861735168. Its totient is φ = 157300128.

The previous prime is 401800171. The next prime is 401800183. The reversal of 401800180 is 81008104.

It is a super-2 number, since 2×401800180² = 322886769296064800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401800183) 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, 212784 + ... + 214663.

It is an arithmetic number, because the mean of its divisors is an integer number (35905632).

Almost surely, 2^401800180 is an apocalyptic number.

It is an amenable number.

401800180 is an abundant number, since it is smaller than the sum of its proper divisors (459934988).

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

401800180 is a wasteful number, since it uses less digits than its factorization.

401800180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427503 (or 427501 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 401800180 is about 20044.9539784954. The cubic root of 401800180 is about 737.9099656862.

Adding to 401800180 its reverse (81008104), we get a palindrome (482808284).

The spelling of 401800180 in words is "four hundred one million, eight hundred thousand, one hundred eighty".