8640252 has 18 divisors (see below), whose sum is σ = 21840728. Its totient is φ = 2880072.

The previous prime is 8640251. The next prime is 8640259. The reversal of 8640252 is 2520468.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8640251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119968 + ... + 120039.

Almost surely, 2^8640252 is an apocalyptic number.

It is an amenable number.

8640252 is an abundant number, since it is smaller than the sum of its proper divisors (13200476).

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

8640252 is a wasteful number, since it uses less digits than its factorization.

8640252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240017 (or 240012 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 8640252 is about 2939.4305570978. The cubic root of 8640252 is about 205.1991085537.

The spelling of 8640252 in words is "eight million, six hundred forty thousand, two hundred fifty-two".