86172784 has 20 divisors (see below), whose sum is σ = 168494920. Its totient is φ = 42690240.

The previous prime is 86172781. The next prime is 86172791. The reversal of 86172784 is 48727168.

It is a self number, because there is not a number n which added to its sum of digits gives 86172784.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86172781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22962 + ... + 26449.

It is an arithmetic number, because the mean of its divisors is an integer number (8424746).

Almost surely, 2^86172784 is an apocalyptic number.

It is an amenable number.

86172784 is a deficient number, since it is larger than the sum of its proper divisors (82322136).

86172784 is a wasteful number, since it uses less digits than its factorization.

86172784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49528 (or 49522 counting only the distinct ones).

The product of its digits is 150528, while the sum is 43.

The square root of 86172784 is about 9282.9297099569. The cubic root of 86172784 is about 441.6959068019.

The spelling of 86172784 in words is "eighty-six million, one hundred seventy-two thousand, seven hundred eighty-four".