6939858240 has 252 divisors, whose sum is σ = 27767964276. Its totient is φ = 1586221056.

The previous prime is 6939858203. The next prime is 6939858251. The reversal of 6939858240 is 428589396.

6939858240 is a `hidden beast` number, since 6 + 9 + 398 + 5 + 8 + 240 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1937408256 + 5002449984 = 44016^2 + 70728^2 .

It is a tau number, because it is divible by the number of its divisors (252).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 116532 + ... + 165708.

Almost surely, 2^6939858240 is an apocalyptic number.

6939858240 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 6939858240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13883982138).

6939858240 is an abundant number, since it is smaller than the sum of its proper divisors (20828106036).

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

6939858240 is a wasteful number, since it uses less digits than its factorization.

6939858240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49214 (or 49194 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The square root of 6939858240 is about 83305.8115619793. The cubic root of 6939858240 is about 1907.4369869485.

The spelling of 6939858240 in words is "six billion, nine hundred thirty-nine million, eight hundred fifty-eight thousand, two hundred forty".