6899904000 has 800 divisors, whose sum is σ = 28270056672. Its totient is φ = 1672704000.

The previous prime is 6899903993. The next prime is 6899904001. The reversal of 6899904000 is 4099986.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a tau number, because it is divible by the number of its divisors (800).

It is an ABA number since it can be written as A⋅B^A, here for A=3, B=1320.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6899904001) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 627263995 + ... + 627264005.

Almost surely, 2^6899904000 is an apocalyptic number.

6899904000 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 6899904000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14135028336).

6899904000 is an abundant number, since it is smaller than the sum of its proper divisors (21370152672).

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

6899904000 is an frugal number, since it uses more digits than its factorization.

6899904000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 6899904000 is about 83065.6607750760. The cubic root of 6899904000 is about 1903.7694328058.

The spelling of 6899904000 in words is "six billion, eight hundred ninety-nine million, nine hundred four thousand".