840088799 has 4 divisors (see below), whose sum is σ = 916460520. Its totient is φ = 763717080.

The previous prime is 840088793. The next prime is 840088801. The reversal of 840088799 is 997880048.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840088799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 840088799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840088793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38185844 + ... + 38185865.

It is an arithmetic number, because the mean of its divisors is an integer number (229115130).

Almost surely, 2^840088799 is an apocalyptic number.

840088799 is a deficient number, since it is larger than the sum of its proper divisors (76371721).

840088799 is a wasteful number, since it uses less digits than its factorization.

840088799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76371720.

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 840088799 is about 28984.2853801849. The cubic root of 840088799 is about 943.5720430273.

The spelling of 840088799 in words is "eight hundred forty million, eighty-eight thousand, seven hundred ninety-nine".