5540409 has 12 divisors (see below), whose sum is σ = 9146176. Its totient is φ = 3165912.

The previous prime is 5540393. The next prime is 5540411. The reversal of 5540409 is 9040455.

It is not a de Polignac number, because 5540409 - 2⁴ = 5540393 is a prime.

It is a super-2 number, since 2×5540409² = 61392263774562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5540449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43909 + ... + 44034.

Almost surely, 2^5540409 is an apocalyptic number.

It is an amenable number.

5540409 is a deficient number, since it is larger than the sum of its proper divisors (3605767).

5540409 is a wasteful number, since it uses less digits than its factorization.

5540409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87956 (or 87953 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 5540409 is about 2353.8073413090. The cubic root of 5540409 is about 176.9486588620.

The spelling of 5540409 in words is "five million, five hundred forty thousand, four hundred nine".