808235640 has 96 divisors (see below), whose sum is σ = 2741001120. Its totient is φ = 206156544.

The previous prime is 808235639. The next prime is 808235647. The reversal of 808235640 is 46532808.

808235640 is a `hidden beast` number, since 8 + 0 + 8 + 2 + 3 + 5 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 808235595 and 808235604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808235647) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 40527 + ... + 57086.

It is an arithmetic number, because the mean of its divisors is an integer number (28552095).

Almost surely, 2^808235640 is an apocalyptic number.

It is an amenable number.

808235640 is an abundant number, since it is smaller than the sum of its proper divisors (1932765480).

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

808235640 is a wasteful number, since it uses less digits than its factorization.

808235640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97653 (or 97646 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 808235640 is about 28429.4853980863. The cubic root of 808235640 is about 931.4924354766.

The spelling of 808235640 in words is "eight hundred eight million, two hundred thirty-five thousand, six hundred forty".