945980 has 48 divisors (see below), whose sum is σ = 2358720. Its totient is φ = 311808.

The previous prime is 945961. The next prime is 945983. The reversal of 945980 is 89549.

945980 = T₃₉ + T₄₀ + ... + T₁₇₈.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 945980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3944 + ... + 4176.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2⁹⁴⁵⁹⁸⁰ 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 945980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1179360).

945980 is an abundant number, since it is smaller than the sum of its proper divisors (1412740).

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

945980 is a wasteful number, since it uses less digits than its factorization.

945980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 945980 is about 972.6150317572. The cubic root of 945980 is about 98.1658997554.

945980 divided by its sum of digits (35) gives a triangular number (27028 = T₂₃₂).

The spelling of 945980 in words is "nine hundred forty-five thousand, nine hundred eighty".