885640945 has 24 divisors (see below), whose sum is σ = 1238509224. Its totient is φ = 606203136.

The previous prime is 885640937. The next prime is 885640949. The reversal of 885640945 is 549046588.

It can be written as a sum of positive squares in 4 ways, for example, as 37258816 + 848382129 = 6104^2 + 29127^2 .

It is not a de Polignac number, because 885640945 - 2³ = 885640937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (885640949) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 147237 + ... + 153133.

It is an arithmetic number, because the mean of its divisors is an integer number (51604551).

Almost surely, 2^885640945 is an apocalyptic number.

It is an amenable number.

885640945 is a deficient number, since it is larger than the sum of its proper divisors (352868279).

885640945 is a wasteful number, since it uses less digits than its factorization.

885640945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6529 (or 6522 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 49.

The square root of 885640945 is about 29759.7201767759. The cubic root of 885640945 is about 960.3271978576.

The spelling of 885640945 in words is "eight hundred eighty-five million, six hundred forty thousand, nine hundred forty-five".