85509842 has 32 divisors (see below), whose sum is σ = 152064000. Its totient is φ = 35629200.

The previous prime is 85509841. The next prime is 85509869. The reversal of 85509842 is 24890558.

It is a self number, because there is not a number n which added to its sum of digits gives 85509842.

It is not an unprimeable number, because it can be changed into a prime (85509841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9659 + ... + 16257.

It is an arithmetic number, because the mean of its divisors is an integer number (4752000).

Almost surely, 2^85509842 is an apocalyptic number.

85509842 is a deficient number, since it is larger than the sum of its proper divisors (66554158).

85509842 is a wasteful number, since it uses less digits than its factorization.

85509842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6662.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 85509842 is about 9247.1531835479. The cubic root of 85509842 is about 440.5603089106.

The spelling of 85509842 in words is "eighty-five million, five hundred nine thousand, eight hundred forty-two".