6749540 has 48 divisors (see below), whose sum is σ = 16649472. Its totient is φ = 2249856.

The previous prime is 6749531. The next prime is 6749563. The reversal of 6749540 is 459476.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 6749540.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4529 + ... + 5831.

It is an arithmetic number, because the mean of its divisors is an integer number (346864).

Almost surely, 2^6749540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6749540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8324736).

6749540 is an abundant number, since it is smaller than the sum of its proper divisors (9899932).

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

6749540 is a wasteful number, since it uses less digits than its factorization.

6749540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356 (or 1354 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 6749540 is about 2597.9876828038. The cubic root of 6749540 is about 188.9838643224.

Subtracting from 6749540 its reverse (459476), we obtain a square (6290064 = 2508²).

The spelling of 6749540 in words is "six million, seven hundred forty-nine thousand, five hundred forty".