6978049920 has 192 divisors, whose sum is σ = 24169055040. Its totient is φ = 1855180800.

The previous prime is 6978049913. The next prime is 6978049937. The reversal of 6978049920 is 299408796.

6978049920 is a `hidden beast` number, since 69 + 78 + 0 + 499 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2112270 + ... + 2115570.

It is an arithmetic number, because the mean of its divisors is an integer number (125880495).

Almost surely, 2^6978049920 is an apocalyptic number.

6978049920 is a gapful number since it is divisible by the number (60) 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 6978049920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12084527520).

6978049920 is an abundant number, since it is smaller than the sum of its proper divisors (17191005120).

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

6978049920 is a wasteful number, since it uses less digits than its factorization.

6978049920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3693 (or 3678 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 6978049920 is about 83534.7228402657. The cubic root of 6978049920 is about 1910.9296133549.

The spelling of 6978049920 in words is "six billion, nine hundred seventy-eight million, forty-nine thousand, nine hundred twenty".