85785540 has 24 divisors (see below), whose sum is σ = 240199680. Its totient is φ = 22876128.

The previous prime is 85785533. The next prime is 85785541. The reversal of 85785540 is 4558758.

It is a junction number, because it is equal to n+sod(n) for n = 85785492 and 85785501.

It is not an unprimeable number, because it can be changed into a prime (85785541) 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, 714820 + ... + 714939.

It is an arithmetic number, because the mean of its divisors is an integer number (10008320).

Almost surely, 2^85785540 is an apocalyptic number.

It is an amenable number.

85785540 is an abundant number, since it is smaller than the sum of its proper divisors (154414140).

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

85785540 is a wasteful number, since it uses less digits than its factorization.

85785540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429771 (or 1429769 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 42.

The square root of 85785540 is about 9262.0483695563. The cubic root of 85785540 is about 441.0332809453.

The spelling of 85785540 in words is "eighty-five million, seven hundred eighty-five thousand, five hundred forty".