842890 has 16 divisors (see below), whose sum is σ = 1566720. Its totient is φ = 326160.

The previous prime is 842887. The next prime is 842923. The reversal of 842890 is 98248.

842890 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 (31).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1050 + ... + 1669.

It is an arithmetic number, because the mean of its divisors is an integer number (97920).

2⁸⁴²⁸⁹⁰ is an apocalyptic number.

842890 is a deficient number, since it is larger than the sum of its proper divisors (723830).

842890 is a wasteful number, since it uses less digits than its factorization.

842890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 842890 is about 918.0904094914. The cubic root of 842890 is about 94.4619631734.

The spelling of 842890 in words is "eight hundred forty-two thousand, eight hundred ninety".