86385640 has 32 divisors (see below), whose sum is σ = 212038560. Its totient is φ = 31412800.

The previous prime is 86385589. The next prime is 86385659. The reversal of 86385640 is 4658368.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 86385593 and 86385602.

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, 97726 + ... + 98605.

It is an arithmetic number, because the mean of its divisors is an integer number (6626205).

Almost surely, 2^86385640 is an apocalyptic number.

It is an amenable number.

86385640 is an abundant number, since it is smaller than the sum of its proper divisors (125652920).

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

86385640 is a wasteful number, since it uses less digits than its factorization.

86385640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196353 (or 196349 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 86385640 is about 9294.3875537875. The cubic root of 86385640 is about 442.0592864926.

It can be divided in two parts, 86385 and 640, that added together give a square (87025 = 295²).

The spelling of 86385640 in words is "eighty-six million, three hundred eighty-five thousand, six hundred forty".