86549640 has 64 divisors (see below), whose sum is σ = 260357760. Its totient is φ = 23016960.

The previous prime is 86549629. The next prime is 86549641. The reversal of 86549640 is 4694568.

It is a junction number, because it is equal to n+sod(n) for n = 86549592 and 86549601.

It is not an unprimeable number, because it can be changed into a prime (86549641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57700 + ... + 59180.

It is an arithmetic number, because the mean of its divisors is an integer number (4068090).

Almost surely, 2^86549640 is an apocalyptic number.

It is an amenable number.

86549640 is an abundant number, since it is smaller than the sum of its proper divisors (173808120).

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

86549640 is a wasteful number, since it uses less digits than its factorization.

86549640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 86549640 is about 9303.2058990436. The cubic root of 86549640 is about 442.3388541508.

It can be divided in two parts, 865 and 49640, that added together give a palindrome (50505).

The spelling of 86549640 in words is "eighty-six million, five hundred forty-nine thousand, six hundred forty".