86793640 has 16 divisors (see below), whose sum is σ = 195285780. Its totient is φ = 34717440.

The previous prime is 86793617. The next prime is 86793659. The reversal of 86793640 is 4639768.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 83503044 + 3290596 = 9138^2 + 1814^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1084881 + ... + 1084960.

Almost surely, 2^86793640 is an apocalyptic number.

It is an amenable number.

86793640 is an abundant number, since it is smaller than the sum of its proper divisors (108492140).

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

86793640 is a wasteful number, since it uses less digits than its factorization.

86793640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2169852 (or 2169848 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 86793640 is about 9316.3104284905. The cubic root of 86793640 is about 442.7541434315.

The spelling of 86793640 in words is "eighty-six million, seven hundred ninety-three thousand, six hundred forty".