843490 has 8 divisors (see below), whose sum is σ = 1518300. Its totient is φ = 337392.

The previous prime is 843487. The next prime is 843497. The reversal of 843490 is 94348.

It can be written as a sum of positive squares in 2 ways, for example, as 840889 + 2601 = 917^2 + 51^2 .

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

It is a super-2 number, since 2×843490² = 1422950760200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (843497) 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, 42165 + ... + 42184.

2⁸⁴³⁴⁹⁰ is an apocalyptic number.

843490 is a deficient number, since it is larger than the sum of its proper divisors (674810).

843490 is a wasteful number, since it uses less digits than its factorization.

843490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84356.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 843490 is about 918.4171165652. The cubic root of 843490 is about 94.4843716865.

The spelling of 843490 in words is "eight hundred forty-three thousand, four hundred ninety".