945820 has 36 divisors (see below), whose sum is σ = 2112264. Its totient is φ = 355680.

The previous prime is 945817. The next prime is 945823. The reversal of 945820 is 28549.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (945817) and next prime (945823).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7155 + ... + 7285.

It is an arithmetic number, because the mean of its divisors is an integer number (58674).

2⁹⁴⁵⁸²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 945820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1056132).

945820 is an abundant number, since it is smaller than the sum of its proper divisors (1166444).

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

945820 is a wasteful number, since it uses less digits than its factorization.

945820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 945820 is about 972.5327757973. The cubic root of 945820 is about 98.1603649556.

The spelling of 945820 in words is "nine hundred forty-five thousand, eight hundred twenty".