85640130 has 24 divisors (see below), whose sum is σ = 222664572. Its totient is φ = 22837344.

The previous prime is 85640119. The next prime is 85640143. The reversal of 85640130 is 3104658.

85640130 is a `hidden beast` number, since 8 + 5 + 640 + 13 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 83557881 + 2082249 = 9141^2 + 1443^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 85640094 and 85640103.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475689 + ... + 475868.

Almost surely, 2^85640130 is an apocalyptic number.

85640130 is an abundant number, since it is smaller than the sum of its proper divisors (137024442).

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

85640130 is a wasteful number, since it uses less digits than its factorization.

85640130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951570 (or 951567 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 85640130 is about 9254.1952648515. The cubic root of 85640130 is about 440.7839501986.

Adding to 85640130 its reverse (3104658), we get a palindrome (88744788).

The spelling of 85640130 in words is "eighty-five million, six hundred forty thousand, one hundred thirty".