86278257 has 32 divisors (see below), whose sum is σ = 138230400. Its totient is φ = 52871616.

The previous prime is 86278243. The next prime is 86278261. The reversal of 86278257 is 75287268.

It is not a de Polignac number, because 86278257 - 2⁶ = 86278193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86278057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130594 + ... + 131252.

It is an arithmetic number, because the mean of its divisors is an integer number (4319700).

Almost surely, 2^86278257 is an apocalyptic number.

It is an amenable number.

86278257 is a deficient number, since it is larger than the sum of its proper divisors (51952143).

86278257 is a wasteful number, since it uses less digits than its factorization.

86278257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054 (or 1048 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 86278257 is about 9288.6089916629. The cubic root of 86278257 is about 441.8760410086.

The spelling of 86278257 in words is "eighty-six million, two hundred seventy-eight thousand, two hundred fifty-seven".