86798889 has 24 divisors (see below), whose sum is σ = 133178760. Its totient is φ = 54286848.

The previous prime is 86798857. The next prime is 86798903. The reversal of 86798889 is 98889768.

It can be written as a sum of positive squares in 4 ways, for example, as 11108889 + 75690000 = 3333^2 + 8700^2 .

It is not a de Polignac number, because 86798889 - 2⁵ = 86798857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86798839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60027 + ... + 61455.

It is an arithmetic number, because the mean of its divisors is an integer number (5549115).

Almost surely, 2^86798889 is an apocalyptic number.

It is an amenable number.

86798889 is a deficient number, since it is larger than the sum of its proper divisors (46379871).

86798889 is a wasteful number, since it uses less digits than its factorization.

86798889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849 (or 1846 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 63.

The square root of 86798889 is about 9316.5921344663. The cubic root of 86798889 is about 442.7630687001.

The spelling of 86798889 in words is "eighty-six million, seven hundred ninety-eight thousand, eight hundred eighty-nine".