840454680 has 128 divisors (see below), whose sum is σ = 2748453120. Its totient is φ = 204357120.

The previous prime is 840454673. The next prime is 840454691. The reversal of 840454680 is 86454048.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126235 + ... + 132725.

It is an arithmetic number, because the mean of its divisors is an integer number (21472290).

Almost surely, 2^840454680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840454680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1374226560).

840454680 is an abundant number, since it is smaller than the sum of its proper divisors (1907998440).

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

840454680 is a wasteful number, since it uses less digits than its factorization.

840454680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6601 (or 6597 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The square root of 840454680 is about 28990.5964064212. The cubic root of 840454680 is about 943.7090067132.

The spelling of 840454680 in words is "eight hundred forty million, four hundred fifty-four thousand, six hundred eighty".