840745296 has 120 divisors (see below), whose sum is σ = 2440439040. Its totient is φ = 269913600.

The previous prime is 840745291. The next prime is 840745309. The reversal of 840745296 is 692547048.

It is a happy number.

It is a super-2 number, since 2×840745296² = 1413705305492255232, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840745291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1477300 + ... + 1477868.

It is an arithmetic number, because the mean of its divisors is an integer number (20336992).

Almost surely, 2^840745296 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 840745296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1220219520).

840745296 is an abundant number, since it is smaller than the sum of its proper divisors (1599693744).

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

840745296 is a wasteful number, since it uses less digits than its factorization.

840745296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 840745296 is about 28995.6082191769. The cubic root of 840745296 is about 943.8177674186.

The spelling of 840745296 in words is "eight hundred forty million, seven hundred forty-five thousand, two hundred ninety-six".