401632180 has 12 divisors (see below), whose sum is σ = 843427620. Its totient is φ = 160652864.

The previous prime is 401632177. The next prime is 401632199. The reversal of 401632180 is 81236104.

It can be written as a sum of positive squares in 2 ways, for example, as 108743184 + 292888996 = 10428^2 + 17114^2 .

It is a super-2 number, since 2×401632180² = 322616816023104800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10040785 + ... + 10040824.

It is an arithmetic number, because the mean of its divisors is an integer number (70285635).

Almost surely, 2^401632180 is an apocalyptic number.

It is an amenable number.

401632180 is an abundant number, since it is smaller than the sum of its proper divisors (441795440).

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

401632180 is a wasteful number, since it uses less digits than its factorization.

401632180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20081618 (or 20081616 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 401632180 is about 20040.7629595283. The cubic root of 401632180 is about 737.8071068007.

Adding to 401632180 its reverse (81236104), we get a palindrome (482868284).

The spelling of 401632180 in words is "four hundred one million, six hundred thirty-two thousand, one hundred eighty".