5209640 has 16 divisors (see below), whose sum is σ = 11721780. Its totient is φ = 2083840.

The previous prime is 5209627. The next prime is 5209657. The reversal of 5209640 is 469025.

It can be written as a sum of positive squares in 2 ways, for example, as 5207524 + 2116 = 2282^2 + 46^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65081 + ... + 65160.

Almost surely, 2^5209640 is an apocalyptic number.

It is an amenable number.

5209640 is an abundant number, since it is smaller than the sum of its proper divisors (6512140).

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

5209640 is a wasteful number, since it uses less digits than its factorization.

5209640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130252 (or 130248 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 5209640 is about 2282.4635813086. The cubic root of 5209640 is about 173.3548132486.

The spelling of 5209640 in words is "five million, two hundred nine thousand, six hundred forty".