85657242 has 32 divisors (see below), whose sum is σ = 193337280. Its totient is φ = 25061120.

The previous prime is 85657223. The next prime is 85657261. The reversal of 85657242 is 24275658.

It is an interprime number because it is at equal distance from previous prime (85657223) and next prime (85657261).

It is a self number, because there is not a number n which added to its sum of digits gives 85657242.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20463 + ... + 24290.

It is an arithmetic number, because the mean of its divisors is an integer number (6041790).

Almost surely, 2^85657242 is an apocalyptic number.

85657242 is an abundant number, since it is smaller than the sum of its proper divisors (107680038).

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

85657242 is a wasteful number, since it uses less digits than its factorization.

85657242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44798.

The product of its digits is 134400, while the sum is 39.

The square root of 85657242 is about 9255.1197723206. The cubic root of 85657242 is about 440.8133063452.

The spelling of 85657242 in words is "eighty-five million, six hundred fifty-seven thousand, two hundred forty-two".