4551440 has 20 divisors (see below), whose sum is σ = 10582284. Its totient is φ = 1820544.

The previous prime is 4551439. The next prime is 4551473. The reversal of 4551440 is 441554.

It can be written as a sum of positive squares in 2 ways, for example, as 1106704 + 3444736 = 1052^2 + 1856^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28367 + ... + 28526.

Almost surely, 2^4551440 is an apocalyptic number.

4551440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4551440 is an abundant number, since it is smaller than the sum of its proper divisors (6030844).

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

4551440 is a wasteful number, since it uses less digits than its factorization.

4551440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56906 (or 56900 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 4551440 is about 2133.4104152741. The cubic root of 4551440 is about 165.7230588187.

Adding to 4551440 its reverse (441554), we get a palindrome (4992994).

It can be divided in two parts, 45514 and 40, that added together give a palindrome (45554).

The spelling of 4551440 in words is "four million, five hundred fifty-one thousand, four hundred forty".