86861772 has 36 divisors (see below), whose sum is σ = 232484616. Its totient is φ = 27250560.

The previous prime is 86861767. The next prime is 86861779. The reversal of 86861772 is 27716868.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (86861779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70354 + ... + 71577.

It is an arithmetic number, because the mean of its divisors is an integer number (6457906).

Almost surely, 2^86861772 is an apocalyptic number.

It is an amenable number.

86861772 is an abundant number, since it is smaller than the sum of its proper divisors (145622844).

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

86861772 is a wasteful number, since it uses less digits than its factorization.

86861772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141958 (or 141953 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 86861772 is about 9319.9663089520. The cubic root of 86861772 is about 442.8699654183.

The spelling of 86861772 in words is "eighty-six million, eight hundred sixty-one thousand, seven hundred seventy-two".