5640345 has 48 divisors (see below), whose sum is σ = 10597392. Its totient is φ = 2764800.

The previous prime is 5640343. The next prime is 5640347. The reversal of 5640345 is 5430465.

It is an interprime number because it is at equal distance from previous prime (5640343) and next prime (5640347).

It can be written as a sum of positive squares in 8 ways, for example, as 870489 + 4769856 = 933^2 + 2184^2 .

It is not a de Polignac number, because 5640345 - 2¹ = 5640343 is a prime.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (5640343) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55795 + ... + 55895.

It is an arithmetic number, because the mean of its divisors is an integer number (220779).

Almost surely, 2^5640345 is an apocalyptic number.

It is an amenable number.

5640345 is a deficient number, since it is larger than the sum of its proper divisors (4957047).

5640345 is a wasteful number, since it uses less digits than its factorization.

5640345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 5640345 is about 2374.9410519000. The cubic root of 5640345 is about 178.0062384718.

It can be divided in two parts, 56 and 40345, that added together give a square (40401 = 201²).

The spelling of 5640345 in words is "five million, six hundred forty thousand, three hundred forty-five".