842990 has 8 divisors (see below), whose sum is σ = 1517400. Its totient is φ = 337192.

The previous prime is 842987. The next prime is 842993. The reversal of 842990 is 99248.

It is an interprime number because it is at equal distance from previous prime (842987) and next prime (842993).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42140 + ... + 42159.

It is an arithmetic number, because the mean of its divisors is an integer number (189675).

2⁸⁴²⁹⁹⁰ is an apocalyptic number.

842990 is a deficient number, since it is larger than the sum of its proper divisors (674410).

842990 is a wasteful number, since it uses less digits than its factorization.

842990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84306.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 842990 is about 918.1448687435. The cubic root of 842990 is about 94.4656986639.

The spelling of 842990 in words is "eight hundred forty-two thousand, nine hundred ninety".