6945840 has 120 divisors (see below), whose sum is σ = 25476048. Its totient is φ = 1681920.

The previous prime is 6945817. The next prime is 6945857. The reversal of 6945840 is 485496.

It is a tau number, because it is divible by the number of its divisors (120).

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 = 6945795 and 6945804.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7482 + ... + 8358.

Almost surely, 2^6945840 is an apocalyptic number.

6945840 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 6945840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12738024).

6945840 is an abundant number, since it is smaller than the sum of its proper divisors (18530208).

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

6945840 is a wasteful number, since it uses less digits than its factorization.

6945840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 6945840 is about 2635.4961582214. The cubic root of 6945840 is about 190.7984863348.

The spelling of 6945840 in words is "six million, nine hundred forty-five thousand, eight hundred forty".