86278857 has 48 divisors (see below), whose sum is σ = 142436160. Its totient is φ = 46230912.

The previous prime is 86278849. The next prime is 86278861. The reversal of 86278857 is 75887268.

It is not a de Polignac number, because 86278857 - 2³ = 86278849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86278817) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157458 + ... + 158004.

It is an arithmetic number, because the mean of its divisors is an integer number (2967420).

Almost surely, 2^86278857 is an apocalyptic number.

86278857 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

It is an amenable number.

86278857 is a deficient number, since it is larger than the sum of its proper divisors (56157303).

86278857 is a wasteful number, since it uses less digits than its factorization.

86278857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 623 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 51.

The square root of 86278857 is about 9288.6412892306. The cubic root of 86278857 is about 441.8770653107.

The spelling of 86278857 in words is "eighty-six million, two hundred seventy-eight thousand, eight hundred fifty-seven".