87838857 has 16 divisors (see below), whose sum is σ = 131967360. Its totient is φ = 57733200.

The previous prime is 87838853. The next prime is 87838859. The reversal of 87838857 is 75883878.

It is not a de Polignac number, because 87838857 - 2² = 87838853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87838853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20994 + ... + 24827.

It is an arithmetic number, because the mean of its divisors is an integer number (8247960).

Almost surely, 2^87838857 is an apocalyptic number.

It is an amenable number.

87838857 is a deficient number, since it is larger than the sum of its proper divisors (44128503).

87838857 is a wasteful number, since it uses less digits than its factorization.

87838857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45901 (or 45895 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 54.

The square root of 87838857 is about 9372.2386333256. The cubic root of 87838857 is about 444.5243531158.

The spelling of 87838857 in words is "eighty-seven million, eight hundred thirty-eight thousand, eight hundred fifty-seven".