85443980 has 24 divisors (see below), whose sum is σ = 181213200. Its totient is φ = 33838400.

The previous prime is 85443973. The next prime is 85443997. The reversal of 85443980 is 8934458.

It is an unprimeable number.

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, 19130 + ... + 23169.

It is an arithmetic number, because the mean of its divisors is an integer number (7550550).

Almost surely, 2^85443980 is an apocalyptic number.

It is an amenable number.

85443980 is an abundant number, since it is smaller than the sum of its proper divisors (95769220).

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

85443980 is a wasteful number, since it uses less digits than its factorization.

85443980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42409 (or 42407 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 85443980 is about 9243.5912934314. The cubic root of 85443980 is about 440.4471693575.

The spelling of 85443980 in words is "eighty-five million, four hundred forty-three thousand, nine hundred eighty".