868840587 has 10 divisors (see below), whose sum is σ = 1297897788. Its totient is φ = 579227004.

The previous prime is 868840579. The next prime is 868840589. The reversal of 868840587 is 785048868.

868840587 is a `hidden beast` number, since 86 + 88 + 405 + 87 = 666.

It is not a de Polignac number, because 868840587 - 2³ = 868840579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (868840589) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5363133 + ... + 5363294.

Almost surely, 2^868840587 is an apocalyptic number.

868840587 is a deficient number, since it is larger than the sum of its proper divisors (429057201).

868840587 is a wasteful number, since it uses less digits than its factorization.

868840587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10726439 (or 10726430 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 54.

The square root of 868840587 is about 29476.1019641336. The cubic root of 868840587 is about 954.2160125541.

The spelling of 868840587 in words is "eight hundred sixty-eight million, eight hundred forty thousand, five hundred eighty-seven".