85391642 has 16 divisors (see below), whose sum is σ = 146567040. Its totient is φ = 36551088.

The previous prime is 85391641. The next prime is 85391651. The reversal of 85391642 is 24619358.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 85391596 and 85391605.

It is not an unprimeable number, because it can be changed into a prime (85391641) 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, 9548 + ... + 16184.

It is an arithmetic number, because the mean of its divisors is an integer number (9160440).

Almost surely, 2^85391642 is an apocalyptic number.

85391642 is a deficient number, since it is larger than the sum of its proper divisors (61175398).

85391642 is a wasteful number, since it uses less digits than its factorization.

85391642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7565.

The product of its digits is 51840, while the sum is 38.

The square root of 85391642 is about 9240.7598172445. The cubic root of 85391642 is about 440.3572202378.

The spelling of 85391642 in words is "eighty-five million, three hundred ninety-one thousand, six hundred forty-two".