5418640 has 20 divisors (see below), whose sum is σ = 12598524. Its totient is φ = 2167424.

The previous prime is 5418617. The next prime is 5418643. The reversal of 5418640 is 468145.

It can be written as a sum of positive squares in 2 ways, for example, as 2715904 + 2702736 = 1648^2 + 1644^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 5418599 and 5418608.

It is not an unprimeable number, because it can be changed into a prime (5418643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33787 + ... + 33946.

Almost surely, 2^5418640 is an apocalyptic number.

It is an amenable number.

5418640 is an abundant number, since it is smaller than the sum of its proper divisors (7179884).

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

5418640 is a wasteful number, since it uses less digits than its factorization.

5418640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67746 (or 67740 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 5418640 is about 2327.7972420295. The cubic root of 5418640 is about 175.6426979881.

The spelling of 5418640 in words is "five million, four hundred eighteen thousand, six hundred forty".