840354 has 16 divisors (see below), whose sum is σ = 1690848. Its totient is φ = 278432.

The previous prime is 840353. The next prime is 840439. The reversal of 840354 is 453048.

It is a happy number.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840354.

It is not an unprimeable number, because it can be changed into a prime (840353) 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, 1054 + ... + 1670.

It is an arithmetic number, because the mean of its divisors is an integer number (105678).

2⁸⁴⁰³⁵⁴ is an apocalyptic number.

840354 is an abundant number, since it is smaller than the sum of its proper divisors (850494).

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

840354 is a wasteful number, since it uses less digits than its factorization.

840354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 840354 is about 916.7082414814. The cubic root of 840354 is about 94.3671322184.

The spelling of 840354 in words is "eight hundred forty thousand, three hundred fifty-four".