840058 has 4 divisors (see below), whose sum is σ = 1260090. Its totient is φ = 420028.

The previous prime is 840053. The next prime is 840061. The reversal of 840058 is 850048.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 815409 + 24649 = 903^2 + 157^2 .

It is not an unprimeable number, because it can be changed into a prime (840053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210013 + ... + 210016.

2⁸⁴⁰⁰⁵⁸ is an apocalyptic number.

840058 is a deficient number, since it is larger than the sum of its proper divisors (420032).

840058 is a wasteful number, since it uses less digits than its factorization.

840058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420031.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 840058 is about 916.5467800391. The cubic root of 840058 is about 94.3560511933.

The spelling of 840058 in words is "eight hundred forty thousand, fifty-eight".