86394881 has 12 divisors (see below), whose sum is σ = 92240100. Its totient is φ = 80898048.

The previous prime is 86394851. The next prime is 86394899. The reversal of 86394881 is 18849368.

It can be written as a sum of positive squares in 2 ways, for example, as 8673025 + 77721856 = 2945^2 + 8816^2 .

It is not a de Polignac number, because 86394881 - 2¹⁸ = 86132737 is a prime.

It is a super-2 number, since 2×86394881² = 14928150926008322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86394811) 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, 30785 + ... + 33473.

It is an arithmetic number, because the mean of its divisors is an integer number (7686675).

Almost surely, 2^86394881 is an apocalyptic number.

It is an amenable number.

86394881 is a deficient number, since it is larger than the sum of its proper divisors (5845219).

86394881 is a wasteful number, since it uses less digits than its factorization.

86394881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816 (or 2797 counting only the distinct ones).

The product of its digits is 331776, while the sum is 47.

The square root of 86394881 is about 9294.8846684615. The cubic root of 86394881 is about 442.0750488509.

The spelling of 86394881 in words is "eighty-six million, three hundred ninety-four thousand, eight hundred eighty-one".