86865012 has 72 divisors (see below), whose sum is σ = 237621384. Its totient is φ = 26597376.

The previous prime is 86865001. The next prime is 86865013. The reversal of 86865012 is 21056868.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 820836 + 86044176 = 906^2 + 9276^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86865013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146188 + ... + 146780.

It is an arithmetic number, because the mean of its divisors is an integer number (3300297).

Almost surely, 2^86865012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86865012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118810692).

86865012 is an abundant number, since it is smaller than the sum of its proper divisors (150756372).

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

86865012 is a wasteful number, since it uses less digits than its factorization.

86865012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929 (or 924 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 86865012 is about 9320.1401277019. The cubic root of 86865012 is about 442.8754717948.

The spelling of 86865012 in words is "eighty-six million, eight hundred sixty-five thousand, twelve".