86781868 has 6 divisors (see below), whose sum is σ = 151868276. Its totient is φ = 43390932.

The previous prime is 86781841. The next prime is 86781883. The reversal of 86781868 is 86818768.

It is a super-2 number, since 2×86781868² = 15062185227138848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10847730 + ... + 10847737.

Almost surely, 2^86781868 is an apocalyptic number.

It is an amenable number.

86781868 is a deficient number, since it is larger than the sum of its proper divisors (65086408).

86781868 is a wasteful number, since it uses less digits than its factorization.

86781868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21695471 (or 21695469 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 52.

The square root of 86781868 is about 9315.6786118887. The cubic root of 86781868 is about 442.7341253079.

It can be divided in two parts, 8 and 6781868, that added together give a palindrome (6781876).

The spelling of 86781868 in words is "eighty-six million, seven hundred eighty-one thousand, eight hundred sixty-eight".