840488 has 16 divisors (see below), whose sum is σ = 1719360. Its totient is φ = 382000.

The previous prime is 840479. The next prime is 840491. The reversal of 840488 is 884048.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4688 + ... + 4863.

It is an arithmetic number, because the mean of its divisors is an integer number (107460).

2⁸⁴⁰⁴⁸⁸ is an apocalyptic number.

840488 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

840488 is an abundant number, since it is smaller than the sum of its proper divisors (878872).

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

840488 is a wasteful number, since it uses less digits than its factorization.

840488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9568 (or 9564 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 840488 is about 916.7813261624. The cubic root of 840488 is about 94.3721477728.

Subtracting from 840488 its sum of digits (32), we obtain a triangular number (840456 = T₁₂₉₆).

The spelling of 840488 in words is "eight hundred forty thousand, four hundred eighty-eight".