840720741 has 8 divisors (see below), whose sum is σ = 1281098304. Its totient is φ = 480411840.

The previous prime is 840720731. The next prime is 840720743. The reversal of 840720741 is 147027048.

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

It is not a de Polignac number, because 840720741 - 2⁵ = 840720709 is a prime.

It is a super-2 number, since 2×840720741² = 1413622728695178162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840720743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20017140 + ... + 20017181.

It is an arithmetic number, because the mean of its divisors is an integer number (160137288).

Almost surely, 2^840720741 is an apocalyptic number.

It is an amenable number.

840720741 is a deficient number, since it is larger than the sum of its proper divisors (440377563).

840720741 is a wasteful number, since it uses less digits than its factorization.

840720741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40034331.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 840720741 is about 28995.1847898923. The cubic root of 840720741 is about 943.8085788764.

Adding to 840720741 its reverse (147027048), we get a palindrome (987747789).

The spelling of 840720741 in words is "eight hundred forty million, seven hundred twenty thousand, seven hundred forty-one".