885143440 has 40 divisors (see below), whose sum is σ = 2071798200. Its totient is φ = 351676416.

The previous prime is 885143417. The next prime is 885143449. The reversal of 885143440 is 44341588.

It can be written as a sum of positive squares in 4 ways, for example, as 52012944 + 833130496 = 7212^2 + 28864^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 885143440.

It is not an unprimeable number, because it can be changed into a prime (885143449) 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 7 ways as a sum of consecutive naturals, for example, 25209 + ... + 49048.

It is an arithmetic number, because the mean of its divisors is an integer number (51794955).

Almost surely, 2^885143440 is an apocalyptic number.

885143440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

885143440 is an abundant number, since it is smaller than the sum of its proper divisors (1186654760).

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

885143440 is a wasteful number, since it uses less digits than its factorization.

885143440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74419 (or 74413 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 885143440 is about 29751.3603050348. The cubic root of 885143440 is about 960.1473442821.

The spelling of 885143440 in words is "eight hundred eighty-five million, one hundred forty-three thousand, four hundred forty".