8669619840 has 256 divisors, whose sum is σ = 31726080000. Its totient is φ = 1972604928.

The previous prime is 8669619773. The next prime is 8669619841. The reversal of 8669619840 is 489169668.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8669619841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3210811 + ... + 3213509.

It is an arithmetic number, because the mean of its divisors is an integer number (123930000).

Almost surely, 2^8669619840 is an apocalyptic number.

8669619840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8669619840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15863040000).

8669619840 is an abundant number, since it is smaller than the sum of its proper divisors (23056460160).

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

8669619840 is a wasteful number, since it uses less digits than its factorization.

8669619840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967 (or 2955 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 57.

The square root of 8669619840 is about 93110.7933593093. The cubic root of 8669619840 is about 2054.3133325401.

The spelling of 8669619840 in words is "eight billion, six hundred sixty-nine million, six hundred nineteen thousand, eight hundred forty".