845377220 has 12 divisors (see below), whose sum is σ = 1775292204. Its totient is φ = 338150880.

The previous prime is 845377219. The next prime is 845377261. The reversal of 845377220 is 22773548.

845377220 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 2 ways, for example, as 417466624 + 427910596 = 20432^2 + 20686^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21134411 + ... + 21134450.

It is an arithmetic number, because the mean of its divisors is an integer number (147941017).

Almost surely, 2^845377220 is an apocalyptic number.

It is an amenable number.

845377220 is an abundant number, since it is smaller than the sum of its proper divisors (929914984).

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

845377220 is a wasteful number, since it uses less digits than its factorization.

845377220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42268870 (or 42268868 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 845377220 is about 29075.3713647823. The cubic root of 845377220 is about 945.5478547353.

The spelling of 845377220 in words is "eight hundred forty-five million, three hundred seventy-seven thousand, two hundred twenty".