6894990720 has 192 divisors, whose sum is σ = 23912871840. Its totient is φ = 1830666240.

The previous prime is 6894990719. The next prime is 6894990793. The reversal of 6894990720 is 270994986.

6894990720 is a `hidden beast` number, since 6 + 89 + 499 + 0 + 72 + 0 = 666.

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

It is a super-2 number, since 2×6894990720² = 95081794057772236800, which contains 22 as substring.

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, 1385677 + ... + 1390643.

Almost surely, 2^6894990720 is an apocalyptic number.

6894990720 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 6894990720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11956435920).

6894990720 is an abundant number, since it is smaller than the sum of its proper divisors (17017881120).

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

6894990720 is a wasteful number, since it uses less digits than its factorization.

6894990720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5233 (or 5218 counting only the distinct ones).

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

The square root of 6894990720 is about 83036.0808323707. The cubic root of 6894990720 is about 1903.3174471278.

The spelling of 6894990720 in words is "six billion, eight hundred ninety-four million, nine hundred ninety thousand, seven hundred twenty".