8619219640 has 128 divisors (see below), whose sum is σ = 21620856960. Its totient is φ = 3075702784.

The previous prime is 8619219619. The next prime is 8619219643. The reversal of 8619219640 is 469129168.

It is a happy number.

8619219640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8619219643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1764882 + ... + 1769758.

It is an arithmetic number, because the mean of its divisors is an integer number (168912945).

Almost surely, 2^8619219640 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 8619219640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10810428480).

8619219640 is an abundant number, since it is smaller than the sum of its proper divisors (13001637320).

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

8619219640 is a wasteful number, since it uses less digits than its factorization.

8619219640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041 (or 5037 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 8619219640 is about 92839.7524770505. The cubic root of 8619219640 is about 2050.3247266678.

The spelling of 8619219640 in words is "eight billion, six hundred nineteen million, two hundred nineteen thousand, six hundred forty".