6890220840 has 128 divisors (see below), whose sum is σ = 21071329920. Its totient is φ = 1801958400.

The previous prime is 6890220833. The next prime is 6890220877. The reversal of 6890220840 is 480220986.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2904855 + ... + 2907225.

It is an arithmetic number, because the mean of its divisors is an integer number (164619765).

Almost surely, 2^6890220840 is an apocalyptic number.

6890220840 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 6890220840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10535664960).

6890220840 is an abundant number, since it is smaller than the sum of its proper divisors (14181109080).

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

6890220840 is a wasteful number, since it uses less digits than its factorization.

6890220840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843 (or 2839 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 6890220840 is about 83007.3541320286. The cubic root of 6890220840 is about 1902.8784477397.

The spelling of 6890220840 in words is "six billion, eight hundred ninety million, two hundred twenty thousand, eight hundred forty".