840697140 has 48 divisors (see below), whose sum is σ = 2357732160. Its totient is φ = 223825920.

The previous prime is 840697129. The next prime is 840697147. The reversal of 840697140 is 41796048.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840697147) 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 15 ways as a sum of consecutive naturals, for example, 27531 + ... + 49389.

It is an arithmetic number, because the mean of its divisors is an integer number (49119420).

Almost surely, 2^840697140 is an apocalyptic number.

It is an amenable number.

840697140 is an abundant number, since it is smaller than the sum of its proper divisors (1517035020).

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

840697140 is a wasteful number, since it uses less digits than its factorization.

840697140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22512 (or 22510 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 840697140 is about 28994.7778056670. Note that the first 3 decimals coincide. The cubic root of 840697140 is about 943.7997471547.

The spelling of 840697140 in words is "eight hundred forty million, six hundred ninety-seven thousand, one hundred forty".