401441540 has 48 divisors (see below), whose sum is σ = 887580288. Its totient is φ = 152216064.

The previous prime is 401441533. The next prime is 401441543. The reversal of 401441540 is 45144104.

It is a happy number.

It is a super-2 number, since 2×401441540² = 322310620075143200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (401441543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48119 + ... + 55841.

It is an arithmetic number, because the mean of its divisors is an integer number (18491256).

Almost surely, 2^401441540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401441540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443790144).

401441540 is an abundant number, since it is smaller than the sum of its proper divisors (486138748).

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

401441540 is a wasteful number, since it uses less digits than its factorization.

401441540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7868 (or 7866 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 401441540 is about 20036.0060890388. The cubic root of 401441540 is about 737.6903517079.

Adding to 401441540 its reverse (45144104), we get a palindrome (446585644).

It can be divided in two parts, 4014 and 41540, that added together give a palindrome (45554).

The spelling of 401441540 in words is "four hundred one million, four hundred forty-one thousand, five hundred forty".