6890684868 has 72 divisors (see below), whose sum is σ = 18615254112. Its totient is φ = 2141559552.

The previous prime is 6890684863. The next prime is 6890684887. The reversal of 6890684868 is 8684860986.

6890684868 is a `hidden beast` number, since 6 + 8 + 90 + 68 + 486 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (6890684863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12871 + ... + 118097.

It is an arithmetic number, because the mean of its divisors is an integer number (258545196).

Almost surely, 2^6890684868 is an apocalyptic number.

6890684868 is a gapful number since it is divisible by the number (68) 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 6890684868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9307627056).

6890684868 is an abundant number, since it is smaller than the sum of its proper divisors (11724569244).

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

6890684868 is a wasteful number, since it uses less digits than its factorization.

6890684868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105361 (or 105356 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 63.

The square root of 6890684868 is about 83010.1491867109. The cubic root of 6890684868 is about 1902.9211637900.

The spelling of 6890684868 in words is "six billion, eight hundred ninety million, six hundred eighty-four thousand, eight hundred sixty-eight".