8621840349 has 48 divisors (see below), whose sum is σ = 13682934720. Its totient is φ = 5212097280.

The previous prime is 8621840299. The next prime is 8621840363. The reversal of 8621840349 is 9430481268.

It is a happy number.

It is not a de Polignac number, because 8621840349 - 2⁷ = 8621840221 is a prime.

It is a super-2 number, since 2×8621840349² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8621848349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 359982 + ... + 383184.

It is an arithmetic number, because the mean of its divisors is an integer number (285061140).

Almost surely, 2^8621840349 is an apocalyptic number.

It is an amenable number.

8621840349 is a deficient number, since it is larger than the sum of its proper divisors (5061094371).

8621840349 is a wasteful number, since it uses less digits than its factorization.

8621840349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23322 (or 23319 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 8621840349 is about 92853.8655576600. The cubic root of 8621840349 is about 2050.5325088178.

The spelling of 8621840349 in words is "eight billion, six hundred twenty-one million, eight hundred forty thousand, three hundred forty-nine".