845540 has 24 divisors (see below), whose sum is σ = 1804992. Its totient is φ = 332640.

The previous prime is 845531. The next prime is 845567. The reversal of 845540 is 45548.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 845540.

It is an unprimeable number.

845540 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025 + ... + 1655.

It is an arithmetic number, because the mean of its divisors is an integer number (75208).

2⁸⁴⁵⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

845540 is an abundant number, since it is smaller than the sum of its proper divisors (959452).

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

845540 is a wasteful number, since it uses less digits than its factorization.

845540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 845540 is about 919.5324899100. The cubic root of 845540 is about 94.5608540229.

The spelling of 845540 in words is "eight hundred forty-five thousand, five hundred forty".