845650 has 24 divisors (see below), whose sum is σ = 1695204. Its totient is φ = 312000.

The previous prime is 845623. The next prime is 845653. The reversal of 845650 is 56548.

845650 is a nontrivial binomial coefficient, being equal to C(1301, 2).

It can be written as a sum of positive squares in 6 ways, for example, as 4761 + 840889 = 69^2 + 917^2 .

It is not an unprimeable number, because it can be changed into a prime (845653) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1 + ... + 1300.

2⁸⁴⁵⁶⁵⁰ is an apocalyptic number.

845650 is the 1300-th triangular number.

845650 is the 434-th centered nonagonal number.

845650 is an abundant number, since it is smaller than the sum of its proper divisors (849554).

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

845650 is a wasteful number, since it uses less digits than its factorization.

845650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326 (or 1321 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 845650 is about 919.5923009682. The cubic root of 845650 is about 94.5649544569.

The spelling of 845650 in words is "eight hundred forty-five thousand, six hundred fifty".