86885631 has 12 divisors (see below), whose sum is σ = 143430352. Its totient is φ = 49648896.

The previous prime is 86885599. The next prime is 86885633. The reversal of 86885631 is 13658868.

86885631 is a `hidden beast` number, since 8 + 6 + 8 + 8 + 5 + 631 = 666.

It is not a de Polignac number, because 86885631 - 2⁵ = 86885599 is a prime.

It is a super-2 number, since 2×86885631² = 15098225748536322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86885633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 689506 + ... + 689631.

Almost surely, 2^86885631 is an apocalyptic number.

86885631 is a deficient number, since it is larger than the sum of its proper divisors (56544721).

86885631 is a wasteful number, since it uses less digits than its factorization.

86885631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379150 (or 1379147 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 86885631 is about 9321.2462149650. The cubic root of 86885631 is about 442.9105105548.

The spelling of 86885631 in words is "eighty-six million, eight hundred eighty-five thousand, six hundred thirty-one".