85408140 has 24 divisors (see below), whose sum is σ = 239142960. Its totient is φ = 22775488.

The previous prime is 85408139. The next prime is 85408159. The reversal of 85408140 is 4180458.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 85408098 and 85408107.

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 7 ways as a sum of consecutive naturals, for example, 711675 + ... + 711794.

It is an arithmetic number, because the mean of its divisors is an integer number (9964290).

Almost surely, 2^85408140 is an apocalyptic number.

It is an amenable number.

85408140 is an abundant number, since it is smaller than the sum of its proper divisors (153734820).

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

85408140 is a wasteful number, since it uses less digits than its factorization.

85408140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423481 (or 1423479 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 85408140 is about 9241.6524496434. The cubic root of 85408140 is about 440.3855779920.

Adding to 85408140 its reverse (4180458), we get a palindrome (89588598).

The spelling of 85408140 in words is "eighty-five million, four hundred eight thousand, one hundred forty".