6889839390 has 192 divisors, whose sum is σ = 21872612736. Its totient is φ = 1468809216.

The previous prime is 6889839371. The next prime is 6889839409. The reversal of 6889839390 is 939389886.

It is an interprime number because it is at equal distance from previous prime (6889839371) and next prime (6889839409).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1207384 + ... + 1213076.

It is an arithmetic number, because the mean of its divisors is an integer number (113919858).

Almost surely, 2^6889839390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6889839390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10936306368).

6889839390 is an abundant number, since it is smaller than the sum of its proper divisors (14982773346).

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

6889839390 is a wasteful number, since it uses less digits than its factorization.

6889839390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5843 (or 5840 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 63.

The square root of 6889839390 is about 83005.0564122452. The cubic root of 6889839390 is about 1902.8433319625.

The spelling of 6889839390 in words is "six billion, eight hundred eighty-nine million, eight hundred thirty-nine thousand, three hundred ninety".