840261445 has 8 divisors (see below), whose sum is σ = 1008776736. Its totient is φ = 671900496.

The previous prime is 840261437. The next prime is 840261449. The reversal of 840261445 is 544162048.

840261445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 840261445 - 2³ = 840261437 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 840261445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840261449) 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, 26247 + ... + 48676.

It is an arithmetic number, because the mean of its divisors is an integer number (126097092).

Almost surely, 2^840261445 is an apocalyptic number.

It is an amenable number.

840261445 is a deficient number, since it is larger than the sum of its proper divisors (168515291).

840261445 is a wasteful number, since it uses less digits than its factorization.

840261445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77171.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 840261445 is about 28987.2634962323. The cubic root of 840261445 is about 943.6366761871.

The spelling of 840261445 in words is "eight hundred forty million, two hundred sixty-one thousand, four hundred forty-five".