8343149640 has 192 divisors, whose sum is σ = 29237060160. Its totient is φ = 1899072000.

The previous prime is 8343149623. The next prime is 8343149669. The reversal of 8343149640 is 469413438.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 8343149592 and 8343149601.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1473054 + ... + 1478706.

It is an arithmetic number, because the mean of its divisors is an integer number (152276355).

Almost surely, 2^8343149640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8343149640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14618530080).

8343149640 is an abundant number, since it is smaller than the sum of its proper divisors (20893910520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8343149640 is a wasteful number, since it uses less digits than its factorization.

8343149640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932 (or 5921 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 8343149640 is about 91340.8432192302. The cubic root of 8343149640 is about 2028.1964162860.

The spelling of 8343149640 in words is "eight billion, three hundred forty-three million, one hundred forty-nine thousand, six hundred forty".