840274 has 8 divisors (see below), whose sum is σ = 1272960. Its totient is φ = 415956.

The previous prime is 840269. The next prime is 840277. The reversal of 840274 is 472048.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (840277) 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, 1834 + ... + 2245.

It is an arithmetic number, because the mean of its divisors is an integer number (159120).

2⁸⁴⁰²⁷⁴ is an apocalyptic number.

840274 is a deficient number, since it is larger than the sum of its proper divisors (432686).

840274 is a wasteful number, since it uses less digits than its factorization.

840274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4184.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 840274 is about 916.6646060583. The cubic root of 840274 is about 94.3641376034.

The spelling of 840274 in words is "eight hundred forty thousand, two hundred seventy-four".