945478640 has 20 divisors (see below), whose sum is σ = 2198238024. Its totient is φ = 378191424.

The previous prime is 945478609. The next prime is 945478663. The reversal of 945478640 is 46874549.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5909162 + ... + 5909321.

Almost surely, 2^945478640 is an apocalyptic number.

It is an amenable number.

945478640 is an abundant number, since it is smaller than the sum of its proper divisors (1252759384).

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

945478640 is a wasteful number, since it uses less digits than its factorization.

945478640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11818496 (or 11818490 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 945478640 is about 30748.6363925297. The cubic root of 945478640 is about 981.4855437358.

The spelling of 945478640 in words is "nine hundred forty-five million, four hundred seventy-eight thousand, six hundred forty".