840498 has 16 divisors (see below), whose sum is σ = 1705536. Its totient is φ = 276080.

The previous prime is 840491. The next prime is 840523. The reversal of 840498 is 894048.

840498 = T₁₁₇ + T₁₁₈ + ... + T₁₈₇.

840498 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (840491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 561 + ... + 1412.

It is an arithmetic number, because the mean of its divisors is an integer number (106596).

2⁸⁴⁰⁴⁹⁸ is an apocalyptic number.

840498 is an abundant number, since it is smaller than the sum of its proper divisors (865038).

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

840498 is a wasteful number, since it uses less digits than its factorization.

840498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 840498 is about 916.7867800094. The cubic root of 840498 is about 94.3725220465.

The spelling of 840498 in words is "eight hundred forty thousand, four hundred ninety-eight".