4265640 has 144 divisors (see below), whose sum is σ = 15085980. Its totient is φ = 1044480.

The previous prime is 4265629. The next prime is 4265663. The reversal of 4265640 is 465624.

It is a happy number.

4265640 is a `hidden beast` number, since 4 + 2 + 656 + 4 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1887876 + 2377764 = 1374^2 + 1542^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 104020 + ... + 104060.

Almost surely, 2^4265640 is an apocalyptic number.

4265640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4265640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7542990).

4265640 is an abundant number, since it is smaller than the sum of its proper divisors (10820340).

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

4265640 is a wasteful number, since it uses less digits than its factorization.

4265640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 4265640 is about 2065.3425865943. The cubic root of 4265640 is about 162.1790430174.

The spelling of 4265640 in words is "four million, two hundred sixty-five thousand, six hundred forty".