5409640 has 16 divisors (see below), whose sum is σ = 12171780. Its totient is φ = 2163840.

The previous prime is 5409629. The next prime is 5409643. The reversal of 5409640 is 469045.

It can be written as a sum of positive squares in 2 ways, for example, as 5391684 + 17956 = 2322^2 + 134^2 .

It is a junction number, because it is equal to n+sod(n) for n = 5409599 and 5409608.

It is not an unprimeable number, because it can be changed into a prime (5409643) 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, 67581 + ... + 67660.

Almost surely, 2^5409640 is an apocalyptic number.

It is an amenable number.

5409640 is an abundant number, since it is smaller than the sum of its proper divisors (6762140).

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

5409640 is a wasteful number, since it uses less digits than its factorization.

5409640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135252 (or 135248 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 5409640 is about 2325.8632805907. The cubic root of 5409640 is about 175.5454004938.

The spelling of 5409640 in words is "five million, four hundred nine thousand, six hundred forty".