4401540 has 240 divisors, whose sum is σ = 17075520. Its totient is φ = 933120.

The previous prime is 4401517. The next prime is 4401563. The reversal of 4401540 is 451044.

It is an interprime number because it is at equal distance from previous prime (4401517) and next prime (4401563).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 231651 + ... + 231669.

It is an arithmetic number, because the mean of its divisors is an integer number (71148).

Almost surely, 2^4401540 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 4401540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8537760).

4401540 is an abundant number, since it is smaller than the sum of its proper divisors (12673980).

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

4401540 is a wasteful number, since it uses less digits than its factorization.

4401540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 53 counting only the distinct ones).

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

The square root of 4401540 is about 2097.9847473230. The cubic root of 4401540 is about 163.8833693865.

Adding to 4401540 its reverse (451044), we get a palindrome (4852584).

The spelling of 4401540 in words is "four million, four hundred one thousand, five hundred forty".