840459330 has 144 divisors (see below), whose sum is σ = 2318883840. Its totient is φ = 211159872.

The previous prime is 840459289. The next prime is 840459341. The reversal of 840459330 is 33954048.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6046401 + ... + 6046539.

It is an arithmetic number, because the mean of its divisors is an integer number (16103360).

Almost surely, 2^840459330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840459330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159441920).

840459330 is an abundant number, since it is smaller than the sum of its proper divisors (1478424510).

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

840459330 is a wasteful number, since it uses less digits than its factorization.

840459330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 840459330 is about 28990.6766047293. The cubic root of 840459330 is about 943.7107471357.

The spelling of 840459330 in words is "eight hundred forty million, four hundred fifty-nine thousand, three hundred thirty".