86839478 has 16 divisors (see below), whose sum is σ = 144432720. Its totient is φ = 38824800.

The previous prime is 86839471. The next prime is 86839549. The reversal of 86839478 is 87493868.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86839471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31013 + ... + 33696.

It is an arithmetic number, because the mean of its divisors is an integer number (9027045).

Almost surely, 2^86839478 is an apocalyptic number.

86839478 is a deficient number, since it is larger than the sum of its proper divisors (57593242).

86839478 is a wasteful number, since it uses less digits than its factorization.

86839478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64783.

The product of its digits is 2322432, while the sum is 53.

The square root of 86839478 is about 9318.7701978319. The cubic root of 86839478 is about 442.8320730767.

The spelling of 86839478 in words is "eighty-six million, eight hundred thirty-nine thousand, four hundred seventy-eight".