4365640 has 16 divisors (see below), whose sum is σ = 9822780. Its totient is φ = 1746240.

The previous prime is 4365623. The next prime is 4365677. The reversal of 4365640 is 465634.

It can be written as a sum of positive squares in 2 ways, for example, as 4137156 + 228484 = 2034^2 + 478^2 .

It is a d-powerful number, because it can be written as 4⁸ + 3⁹ + 6³ + 5⁷ + 6⁵ + 4¹¹ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 4365599 and 4365608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54531 + ... + 54610.

Almost surely, 2^4365640 is an apocalyptic number.

4365640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4365640 is an abundant number, since it is smaller than the sum of its proper divisors (5457140).

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

4365640 is a wasteful number, since it uses less digits than its factorization.

4365640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109152 (or 109148 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 4365640 is about 2089.4114003709. The cubic root of 4365640 is about 163.4365953529.

It can be divided in two parts, 4365 and 640, that added together give a palindrome (5005).

The spelling of 4365640 in words is "four million, three hundred sixty-five thousand, six hundred forty".