845171478 has 24 divisors (see below), whose sum is σ = 1910823408. Its totient is φ = 269474832.

The previous prime is 845171441. The next prime is 845171491. The reversal of 845171478 is 874171548.

845171478 is a `hidden beast` number, since 8 + 4 + 5 + 171 + 478 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1020325 + ... + 1021152.

It is an arithmetic number, because the mean of its divisors is an integer number (79617642).

Almost surely, 2^845171478 is an apocalyptic number.

845171478 is an abundant number, since it is smaller than the sum of its proper divisors (1065651930).

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

845171478 is a wasteful number, since it uses less digits than its factorization.

845171478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041508 (or 2041505 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 845171478 is about 29071.8330691410. The cubic root of 845171478 is about 945.4711415687.

The spelling of 845171478 in words is "eight hundred forty-five million, one hundred seventy-one thousand, four hundred seventy-eight".