845605980 has 72 divisors (see below), whose sum is σ = 2660020272. Its totient is φ = 225493632.

The previous prime is 845605961. The next prime is 845605987. The reversal of 845605980 is 89506548.

845605980 is a `hidden beast` number, since 8 + 4 + 56 + 0 + 598 + 0 = 666.

845605980 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845605987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82137 + ... + 91856.

It is an arithmetic number, because the mean of its divisors is an integer number (36944726).

Almost surely, 2^845605980 is an apocalyptic number.

It is an amenable number.

845605980 is an abundant number, since it is smaller than the sum of its proper divisors (1814414292).

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

845605980 is a wasteful number, since it uses less digits than its factorization.

845605980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174017 (or 174003 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 845605980 is about 29079.3050123279. The cubic root of 845605980 is about 945.6331358045.

The spelling of 845605980 in words is "eight hundred forty-five million, six hundred five thousand, nine hundred eighty".