401544560 has 80 divisors (see below), whose sum is σ = 956054880. Its totient is φ = 156794880.

The previous prime is 401544553. The next prime is 401544569. The reversal of 401544560 is 65445104.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×401544560² = 322476067331187200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401544569) 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 15 ways as a sum of consecutive naturals, for example, 1137344 + ... + 1137696.

It is an arithmetic number, because the mean of its divisors is an integer number (11950686).

Almost surely, 2^401544560 is an apocalyptic number.

401544560 is a gapful number since it is divisible by the number (40) 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 401544560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (478027440).

401544560 is an abundant number, since it is smaller than the sum of its proper divisors (554510320).

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

401544560 is a wasteful number, since it uses less digits than its factorization.

401544560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 401544560 is about 20038.5767957707. The cubic root of 401544560 is about 737.7534496126.

Adding to 401544560 its reverse (65445104), we get a palindrome (466989664).

The spelling of 401544560 in words is "four hundred one million, five hundred forty-four thousand, five hundred sixty".