945991680 has 208 divisors, whose sum is σ = 3078505440. Its totient is φ = 247988224.

The previous prime is 945991661. The next prime is 945991681. The reversal of 945991680 is 86199549.

It is not an unprimeable number, because it can be changed into a prime (945991681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5468074 + ... + 5468246.

Almost surely, 2^945991680 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 945991680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1539252720).

945991680 is an abundant number, since it is smaller than the sum of its proper divisors (2132513760).

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

945991680 is a wasteful number, since it uses less digits than its factorization.

945991680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 945991680 is about 30756.9777448955. The cubic root of 945991680 is about 981.6630377131.

The spelling of 945991680 in words is "nine hundred forty-five million, nine hundred ninety-one thousand, six hundred eighty".