5401440 has 216 divisors, whose sum is σ = 20913984. Its totient is φ = 1267200.

The previous prime is 5401439. The next prime is 5401447. The reversal of 5401440 is 441045.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5401447) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 174225 + ... + 174255.

It is an arithmetic number, because the mean of its divisors is an integer number (96824).

Almost surely, 2^5401440 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 5401440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10456992).

5401440 is an abundant number, since it is smaller than the sum of its proper divisors (15512544).

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

5401440 is a wasteful number, since it uses less digits than its factorization.

5401440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 52 counting only the distinct ones).

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

The square root of 5401440 is about 2324.0998257390. The cubic root of 5401440 is about 175.4566576680.

Adding to 5401440 its reverse (441045), we get a palindrome (5842485).

The spelling of 5401440 in words is "five million, four hundred one thousand, four hundred forty".