842790 has 32 divisors (see below), whose sum is σ = 2179296. Its totient is φ = 207360.

The previous prime is 842771. The next prime is 842791. The reversal of 842790 is 97248.

842790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842791) by changing a digit.

842790 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 691 + ... + 1470.

It is an arithmetic number, because the mean of its divisors is an integer number (68103).

2⁸⁴²⁷⁹⁰ is an apocalyptic number.

842790 is an abundant number, since it is smaller than the sum of its proper divisors (1336506).

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

842790 is a wasteful number, since it uses less digits than its factorization.

842790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 842790 is about 918.0359470086. The cubic root of 842790 is about 94.4582273874.

The spelling of 842790 in words is "eight hundred forty-two thousand, seven hundred ninety".