845221700 has 18 divisors (see below), whose sum is σ = 1834131306. Its totient is φ = 338088640.

The previous prime is 845221693. The next prime is 845221739. The reversal of 845221700 is 7122548.

It can be written as a sum of positive squares in 3 ways, for example, as 2829124 + 842392576 = 1682^2 + 29024^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4226009 + ... + 4226208.

Almost surely, 2^845221700 is an apocalyptic number.

It is an amenable number.

845221700 is an abundant number, since it is smaller than the sum of its proper divisors (988909606).

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

845221700 is a wasteful number, since it uses less digits than its factorization.

845221700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8452231 (or 8452224 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 845221700 is about 29072.6968133333. The cubic root of 845221700 is about 945.4898685420.

The spelling of 845221700 in words is "eight hundred forty-five million, two hundred twenty-one thousand, seven hundred".