85108640 has 48 divisors (see below), whose sum is σ = 207567360. Its totient is φ = 32943360.

The previous prime is 85108633. The next prime is 85108643. The reversal of 85108640 is 4680158.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 85108597 and 85108606.

It is not an unprimeable number, because it can be changed into a prime (85108643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3620 + ... + 13539.

It is an arithmetic number, because the mean of its divisors is an integer number (4324320).

Almost surely, 2^85108640 is an apocalyptic number.

85108640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85108640 is an abundant number, since it is smaller than the sum of its proper divisors (122458720).

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

85108640 is a wasteful number, since it uses less digits than its factorization.

85108640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17205 (or 17197 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 85108640 is about 9225.4344071160. The cubic root of 85108640 is about 439.8702096523.

Adding to 85108640 its reverse (4680158), we get a palindrome (89788798).

The spelling of 85108640 in words is "eighty-five million, one hundred eight thousand, six hundred forty".