5144640 has 112 divisors (see below), whose sum is σ = 17117568. Its totient is φ = 1306624.

The previous prime is 5144621. The next prime is 5144647. The reversal of 5144640 is 464415.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 5144640.

It is not an unprimeable number, because it can be changed into a prime (5144647) 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, 21964 + ... + 22196.

Almost surely, 2^5144640 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 5144640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8558784).

5144640 is an abundant number, since it is smaller than the sum of its proper divisors (11972928).

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

5144640 is a wasteful number, since it uses less digits than its factorization.

5144640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 5144640 is about 2268.1798870460. The cubic root of 5144640 is about 172.6308186405.

The spelling of 5144640 in words is "five million, one hundred forty-four thousand, six hundred forty".