8978409804 has 192 divisors, whose sum is σ = 26645262336. Its totient is φ = 2289966336.

The previous prime is 8978409799. The next prime is 8978409809. The reversal of 8978409804 is 4089048798.

It is an interprime number because it is at equal distance from previous prime (8978409799) and next prime (8978409809).

It is a super-2 number, since 2×8978409804² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8978409809) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5023399 + ... + 5025185.

It is an arithmetic number, because the mean of its divisors is an integer number (138777408).

Almost surely, 2^8978409804 is an apocalyptic number.

8978409804 is a gapful number since it is divisible by the number (84) 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 8978409804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13322631168).

8978409804 is an abundant number, since it is smaller than the sum of its proper divisors (17666852532).

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

8978409804 is a wasteful number, since it uses less digits than its factorization.

8978409804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964 (or 1962 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 57.

The square root of 8978409804 is about 94754.4711557191. The cubic root of 8978409804 is about 2078.4191794741.

The spelling of 8978409804 in words is "eight billion, nine hundred seventy-eight million, four hundred nine thousand, eight hundred four".