845398512 has 160 divisors (see below), whose sum is σ = 2819343360. Its totient is φ = 237530880.

The previous prime is 845398507. The next prime is 845398571. The reversal of 845398512 is 215893548.

845398512 is a `hidden beast` number, since 8 + 45 + 3 + 98 + 512 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 182173 + ... + 186755.

It is an arithmetic number, because the mean of its divisors is an integer number (17620896).

Almost surely, 2^845398512 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 845398512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1409671680).

845398512 is an abundant number, since it is smaller than the sum of its proper divisors (1973944848).

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

845398512 is a wasteful number, since it uses less digits than its factorization.

845398512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4668 (or 4656 counting only the distinct ones).

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

The square root of 845398512 is about 29075.7375142919. The cubic root of 845398512 is about 945.5557929809. Note that the first 3 decimals are identical.

The spelling of 845398512 in words is "eight hundred forty-five million, three hundred ninety-eight thousand, five hundred twelve".