86731776 has 88 divisors (see below), whose sum is σ = 256939440. Its totient is φ = 28901376.

The previous prime is 86731753. The next prime is 86731783. The reversal of 86731776 is 67713768.

It is a happy number.

It is a super-2 number, since 2×86731776² = 15044801936228352, which contains 22 as substring.

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, 26080 + ... + 29216.

Almost surely, 2^86731776 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 86731776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128469720).

86731776 is an abundant number, since it is smaller than the sum of its proper divisors (170207664).

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

86731776 is a wasteful number, since it uses less digits than its factorization.

86731776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166 (or 3142 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 86731776 is about 9312.9896381345. The cubic root of 86731776 is about 442.6489243062.

The spelling of 86731776 in words is "eighty-six million, seven hundred thirty-one thousand, seven hundred seventy-six".