401544 has 96 divisors (see below), whose sum is σ = 1317600. Its totient is φ = 112320.

The previous prime is 401539. The next prime is 401551. The reversal of 401544 is 445104.

It is a super-2 number, since 2×401544² = 322475167872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

401544 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30882 + ... + 30894.

It is an arithmetic number, because the mean of its divisors is an integer number (13725).

2⁴⁰¹⁵⁴⁴ is an apocalyptic number.

401544 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (658800).

401544 is an abundant number, since it is smaller than the sum of its proper divisors (916056).

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

401544 is a wasteful number, since it uses less digits than its factorization.

401544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 401544 is about 633.6749955616. The cubic root of 401544 is about 73.7753106652.

Adding to 401544 its reverse (445104), we get a palindrome (846648).

The spelling of 401544 in words is "four hundred one thousand, five hundred forty-four".