86139420 has 24 divisors (see below), whose sum is σ = 241190544. Its totient is φ = 22970496.

The previous prime is 86139409. The next prime is 86139437. The reversal of 86139420 is 2493168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 717769 + ... + 717888.

It is an arithmetic number, because the mean of its divisors is an integer number (10049606).

Almost surely, 2^86139420 is an apocalyptic number.

It is an amenable number.

86139420 is an abundant number, since it is smaller than the sum of its proper divisors (155051124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86139420 is a wasteful number, since it uses less digits than its factorization.

86139420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435669 (or 1435667 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 86139420 is about 9281.1324740034. The cubic root of 86139420 is about 441.6388948164.

The spelling of 86139420 in words is "eighty-six million, one hundred thirty-nine thousand, four hundred twenty".