86839990 has 16 divisors (see below), whose sum is σ = 161354880. Its totient is φ = 33615360.

The previous prime is 86839979. The next prime is 86840003. The reversal of 86839990 is 9993868.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139755 + ... + 140374.

It is an arithmetic number, because the mean of its divisors is an integer number (10084680).

Almost surely, 2^86839990 is an apocalyptic number.

86839990 is a deficient number, since it is larger than the sum of its proper divisors (74514890).

86839990 is a wasteful number, since it uses less digits than its factorization.

86839990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280167.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 86839990 is about 9318.7976692275. The cubic root of 86839990 is about 442.8329433781.

The spelling of 86839990 in words is "eighty-six million, eight hundred thirty-nine thousand, nine hundred ninety".