801681620 has 24 divisors (see below), whose sum is σ = 1706596584. Its totient is φ = 316279296.

The previous prime is 801681619. The next prime is 801681641. The reversal of 801681620 is 26186108.

801681620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 366875716 + 434805904 = 19154^2 + 20852^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273089 + ... + 276008.

It is an arithmetic number, because the mean of its divisors is an integer number (71108191).

Almost surely, 2^801681620 is an apocalyptic number.

It is an amenable number.

801681620 is an abundant number, since it is smaller than the sum of its proper divisors (904914964).

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

801681620 is a wasteful number, since it uses less digits than its factorization.

801681620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549179 (or 549177 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 801681620 is about 28313.9827647048. The cubic root of 801681620 is about 928.9677605518.

The spelling of 801681620 in words is "eight hundred one million, six hundred eighty-one thousand, six hundred twenty".