712021808 has 40 divisors (see below), whose sum is σ = 1469697600. Its totient is φ = 333198144.

The previous prime is 712021777. The next prime is 712021859. The reversal of 712021808 is 808120217.

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, 11123 + ... + 39341.

It is an arithmetic number, because the mean of its divisors is an integer number (36742440).

Almost surely, 2^712021808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 712021808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734848800).

712021808 is an abundant number, since it is smaller than the sum of its proper divisors (757675792).

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

712021808 is a wasteful number, since it uses less digits than its factorization.

712021808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28329 (or 28323 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 712021808 is about 26683.7367698004. The cubic root of 712021808 is about 892.9581357992.

The spelling of 712021808 in words is "seven hundred twelve million, twenty-one thousand, eight hundred eight".