845489400 has 96 divisors (see below), whose sum is σ = 2995463040. Its totient is φ = 193253760.

The previous prime is 845489399. The next prime is 845489423. The reversal of 845489400 is 4984548.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96454 + ... + 104853.

It is an arithmetic number, because the mean of its divisors is an integer number (31202740).

Almost surely, 2^845489400 is an apocalyptic number.

It is an amenable number.

845489400 is an abundant number, since it is smaller than the sum of its proper divisors (2149973640).

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

845489400 is a wasteful number, since it uses less digits than its factorization.

845489400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201333 (or 201324 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 845489400 is about 29077.3004249019. The cubic root of 845489400 is about 945.5896770384.

The spelling of 845489400 in words is "eight hundred forty-five million, four hundred eighty-nine thousand, four hundred".