401581032 has 32 divisors (see below), whose sum is σ = 1005069600. Its totient is φ = 133711424.

The previous prime is 401581013. The next prime is 401581039. The reversal of 401581032 is 230185104.

It is a super-2 number, since 2×401581032² = 322534650524370048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 401580993 and 401581011.

It is not an unprimeable number, because it can be changed into a prime (401581039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13894 + ... + 31562.

It is an arithmetic number, because the mean of its divisors is an integer number (31408425).

Almost surely, 2^401581032 is an apocalyptic number.

It is an amenable number.

401581032 is an abundant number, since it is smaller than the sum of its proper divisors (603488568).

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

401581032 is a wasteful number, since it uses less digits than its factorization.

401581032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18625 (or 18621 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 401581032 is about 20039.4868197766. The cubic root of 401581032 is about 737.7757854725.

The spelling of 401581032 in words is "four hundred one million, five hundred eighty-one thousand, thirty-two".