845475840 has 416 divisors, whose sum is σ = 3302611200. Its totient is φ = 203489280.

The previous prime is 845475833. The next prime is 845475901. The reversal of 845475840 is 48574548.

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

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, 6082491 + ... + 6082629.

Almost surely, 2^845475840 is an apocalyptic number.

845475840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 845475840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1651305600).

845475840 is an abundant number, since it is smaller than the sum of its proper divisors (2457135360).

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

845475840 is a wasteful number, since it uses less digits than its factorization.

845475840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 45.

The square root of 845475840 is about 29077.0672523898. The cubic root of 845475840 is about 945.5846218736.

The spelling of 845475840 in words is "eight hundred forty-five million, four hundred seventy-five thousand, eight hundred forty".