5281440 has 48 divisors (see below), whose sum is σ = 16638048. Its totient is φ = 1408256.

The previous prime is 5281433. The next prime is 5281447. The reversal of 5281440 is 441825.

It is an interprime number because it is at equal distance from previous prime (5281433) and next prime (5281447).

It is a tau number, because it is divible by the number of its divisors (48).

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 5281440.

It is not an unprimeable number, because it can be changed into a prime (5281447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5022 + ... + 5981.

It is an arithmetic number, because the mean of its divisors is an integer number (346626).

Almost surely, 2^5281440 is an apocalyptic number.

It is an amenable number.

5281440 is an abundant number, since it is smaller than the sum of its proper divisors (11356608).

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

5281440 is a wasteful number, since it uses less digits than its factorization.

5281440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11021 (or 11013 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 5281440 is about 2298.1383770348. The cubic root of 5281440 is about 174.1475825440.

The spelling of 5281440 in words is "five million, two hundred eighty-one thousand, four hundred forty".