840073685 has 8 divisors (see below), whose sum is σ = 1099732896. Its totient is φ = 610962640.

The previous prime is 840073669. The next prime is 840073687. The reversal of 840073685 is 586370048.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 840073685 - 2⁴ = 840073669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840073687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7636979 + ... + 7637088.

It is an arithmetic number, because the mean of its divisors is an integer number (137466612).

Almost surely, 2^840073685 is an apocalyptic number.

It is an amenable number.

840073685 is a deficient number, since it is larger than the sum of its proper divisors (259659211).

840073685 is a wasteful number, since it uses less digits than its factorization.

840073685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15274083.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 840073685 is about 28984.0246515214. The cubic root of 840073685 is about 943.5663844059.

The spelling of 840073685 in words is "eight hundred forty million, seventy-three thousand, six hundred eighty-five".