2868389640 has 48 divisors (see below), whose sum is σ = 9322267500. Its totient is φ = 764903808.

The previous prime is 2868389621. The next prime is 2868389653. The reversal of 2868389640 is 469838682.

It can be written as a sum of positive squares in 2 ways, for example, as 2821521924 + 46867716 = 53118^2 + 6846^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3983515 + ... + 3984234.

Almost surely, 2^2868389640 is an apocalyptic number.

2868389640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2868389640 is an abundant number, since it is smaller than the sum of its proper divisors (6453877860).

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

2868389640 is a wasteful number, since it uses less digits than its factorization.

2868389640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7967766 (or 7967759 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The square root of 2868389640 is about 53557.3490755470. The cubic root of 2868389640 is about 1420.8428574126.

The spelling of 2868389640 in words is "two billion, eight hundred sixty-eight million, three hundred eighty-nine thousand, six hundred forty".