945442640 has 40 divisors (see below), whose sum is σ = 2210332488. Its totient is φ = 376081920.

The previous prime is 945442613. The next prime is 945442643. The reversal of 945442640 is 46244549.

It can be written as a sum of positive squares in 4 ways, for example, as 3136 + 945439504 = 56^2 + 30748^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 945442594 and 945442603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945442643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18167 + ... + 47126.

Almost surely, 2^945442640 is an apocalyptic number.

It is an amenable number.

945442640 is an abundant number, since it is smaller than the sum of its proper divisors (1264889848).

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

945442640 is a wasteful number, since it uses less digits than its factorization.

945442640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65487 (or 65481 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 945442640 is about 30748.0509951444. The cubic root of 945442640 is about 981.4730865786.

The spelling of 945442640 in words is "nine hundred forty-five million, four hundred forty-two thousand, six hundred forty".