401581580 has 24 divisors (see below), whose sum is σ = 844754400. Its totient is φ = 160359680.

The previous prime is 401581573. The next prime is 401581591. The reversal of 401581580 is 85185104.

It is a super-2 number, since 2×401581580² = 322535530790592800, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 4781 + ... + 28740.

It is an arithmetic number, because the mean of its divisors is an integer number (35198100).

Almost surely, 2^401581580 is an apocalyptic number.

It is an amenable number.

401581580 is an abundant number, since it is smaller than the sum of its proper divisors (443172820).

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

401581580 is a wasteful number, since it uses less digits than its factorization.

401581580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34129 (or 34127 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 401581580 is about 20039.5004927768. The cubic root of 401581580 is about 737.7761210635.

The spelling of 401581580 in words is "four hundred one million, five hundred eighty-one thousand, five hundred eighty".