6939540 has 96 divisors (see below), whose sum is σ = 22014720. Its totient is φ = 1814400.

The previous prime is 6939533. The next prime is 6939551. The reversal of 6939540 is 459396.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6939495 and 6939504.

It is a congruent number.

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, 38250 + ... + 38430.

It is an arithmetic number, because the mean of its divisors is an integer number (229320).

Almost surely, 2^6939540 is an apocalyptic number.

6939540 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 6939540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11007360).

6939540 is an abundant number, since it is smaller than the sum of its proper divisors (15075180).

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

6939540 is a wasteful number, since it uses less digits than its factorization.

6939540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 6939540 is about 2634.3006662111. The cubic root of 6939540 is about 190.7407830156.

The spelling of 6939540 in words is "six million, nine hundred thirty-nine thousand, five hundred forty".