6745440 has 192 divisors, whose sum is σ = 24385536. Its totient is φ = 1554432.

The previous prime is 6745439. The next prime is 6745451. The reversal of 6745440 is 445476.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 6745398 and 6745407.

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, 143497 + ... + 143543.

It is an arithmetic number, because the mean of its divisors is an integer number (127008).

Almost surely, 2^6745440 is an apocalyptic number.

6745440 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 6745440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12192768).

6745440 is an abundant number, since it is smaller than the sum of its proper divisors (17640096).

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

6745440 is a wasteful number, since it uses less digits than its factorization.

6745440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 6745440 is about 2597.1984906818. The cubic root of 6745440 is about 188.9455905641.

The spelling of 6745440 in words is "six million, seven hundred forty-five thousand, four hundred forty".