808012640 has 96 divisors (see below), whose sum is σ = 1948937760. Its totient is φ = 316514304.

The previous prime is 808012591. The next prime is 808012643. The reversal of 808012640 is 46210808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808012643) 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 15 ways as a sum of consecutive naturals, for example, 1865864 + ... + 1866296.

It is an arithmetic number, because the mean of its divisors is an integer number (20301435).

Almost surely, 2^808012640 is an apocalyptic number.

808012640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 808012640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (974468880).

808012640 is an abundant number, since it is smaller than the sum of its proper divisors (1140925120).

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

808012640 is a wasteful number, since it uses less digits than its factorization.

808012640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 808012640 is about 28425.5631430584. The cubic root of 808012640 is about 931.4067583506.

The spelling of 808012640 in words is "eight hundred eight million, twelve thousand, six hundred forty".