401491180 has 12 divisors (see below), whose sum is σ = 843131520. Its totient is φ = 160596464.

The previous prime is 401491163. The next prime is 401491187. The reversal of 401491180 is 81194104.

It is a super-2 number, since 2×401491180² = 322390335235584800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401491187) by changing a digit.

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, 10037260 + ... + 10037299.

It is an arithmetic number, because the mean of its divisors is an integer number (70260960).

Almost surely, 2^401491180 is an apocalyptic number.

It is an amenable number.

401491180 is an abundant number, since it is smaller than the sum of its proper divisors (441640340).

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

401491180 is a wasteful number, since it uses less digits than its factorization.

401491180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20074568 (or 20074566 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 401491180 is about 20037.2448205835. The cubic root of 401491180 is about 737.7207566662.

The spelling of 401491180 in words is "four hundred one million, four hundred ninety-one thousand, one hundred eighty".