840706560 has 160 divisors (see below), whose sum is σ = 2986505280. Its totient is φ = 224169984.

The previous prime is 840706541. The next prime is 840706561. The reversal of 840706560 is 65607048.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (840706561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63039 + ... + 75201.

It is an arithmetic number, because the mean of its divisors is an integer number (18665658).

Almost surely, 2^840706560 is an apocalyptic number.

840706560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840706560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1493252640).

840706560 is an abundant number, since it is smaller than the sum of its proper divisors (2145798720).

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

840706560 is a wasteful number, since it uses less digits than its factorization.

840706560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12195 (or 12173 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 840706560 is about 28994.9402482571. The cubic root of 840706560 is about 943.8032722293.

The spelling of 840706560 in words is "eight hundred forty million, seven hundred six thousand, five hundred sixty".