840634028249 has 8 divisors (see below), whose sum is σ = 855870512448. Its totient is φ = 825444498960.

The previous prime is 840634028231. The next prime is 840634028287. The reversal of 840634028249 is 942820436048.

It is a happy number.

840634028249 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 a de Polignac number, because none of the positive numbers 2^k-840634028249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 840634028197 and 840634028206.

It is not an unprimeable number, because it can be changed into a prime (840634028749) 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, 11702597 + ... + 11774210.

It is an arithmetic number, because the mean of its divisors is an integer number (106983814056).

Almost surely, 2^840634028249 is an apocalyptic number.

It is an amenable number.

840634028249 is a deficient number, since it is larger than the sum of its proper divisors (15236484199).

840634028249 is a wasteful number, since it uses less digits than its factorization.

840634028249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23477455.

The product of its (nonzero) digits is 2654208, while the sum is 50.

The spelling of 840634028249 in words is "eight hundred forty billion, six hundred thirty-four million, twenty-eight thousand, two hundred forty-nine".