85842040 has 16 divisors (see below), whose sum is σ = 193144680. Its totient is φ = 34336800.

The previous prime is 85842037. The next prime is 85842047. The reversal of 85842040 is 4024858.

It is a junction number, because it is equal to n+sod(n) for n = 85841993 and 85842011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85842047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072986 + ... + 1073065.

Almost surely, 2^85842040 is an apocalyptic number.

It is an amenable number.

85842040 is an abundant number, since it is smaller than the sum of its proper divisors (107302640).

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

85842040 is a wasteful number, since it uses less digits than its factorization.

85842040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146062 (or 2146058 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 85842040 is about 9265.0979487537. The cubic root of 85842040 is about 441.1300840188.

Adding to 85842040 its reverse (4024858), we get a palindrome (89866898).

The spelling of 85842040 in words is "eighty-five million, eight hundred forty-two thousand, forty".