6890894640 has 320 divisors, whose sum is σ = 27641088000. Its totient is φ = 1545163776.

The previous prime is 6890894629. The next prime is 6890894657. The reversal of 6890894640 is 464980986.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 797061 + ... + 805659.

It is an arithmetic number, because the mean of its divisors is an integer number (86378400).

Almost surely, 2^6890894640 is an apocalyptic number.

6890894640 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 6890894640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13820544000).

6890894640 is an abundant number, since it is smaller than the sum of its proper divisors (20750193360).

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

6890894640 is a wasteful number, since it uses less digits than its factorization.

6890894640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8681 (or 8669 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The square root of 6890894640 is about 83011.4127093377. The cubic root of 6890894640 is about 1902.9404737006.

The spelling of 6890894640 in words is "six billion, eight hundred ninety million, eight hundred ninety-four thousand, six hundred forty".