4287660640 has 48 divisors (see below), whose sum is σ = 10403385552. Its totient is φ = 1668708864.

The previous prime is 4287660613. The next prime is 4287660647. The reversal of 4287660640 is 460667824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4287660647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356214 + ... + 368053.

It is an arithmetic number, because the mean of its divisors is an integer number (216737199).

Almost surely, 2^4287660640 is an apocalyptic number.

4287660640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4287660640 is an abundant number, since it is smaller than the sum of its proper divisors (6115724912).

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

4287660640 is a wasteful number, since it uses less digits than its factorization.

4287660640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724319 (or 724311 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 4287660640 is about 65480.2309097944. The cubic root of 4287660640 is about 1624.5763806221.

The spelling of 4287660640 in words is "four billion, two hundred eighty-seven million, six hundred sixty thousand, six hundred forty".