7840945 has 8 divisors (see below), whose sum is σ = 10753344. Its totient is φ = 5376624.

The previous prime is 7840913. The next prime is 7840949. The reversal of 7840945 is 5490487.

7840945 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7840945 - 2⁵ = 7840913 is a prime.

It is a super-2 number, since 2×7840945² = 122960836986050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7840949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111979 + ... + 112048.

It is an arithmetic number, because the mean of its divisors is an integer number (1344168).

Almost surely, 2^7840945 is an apocalyptic number.

It is an amenable number.

7840945 is a deficient number, since it is larger than the sum of its proper divisors (2912399).

7840945 is a wasteful number, since it uses less digits than its factorization.

7840945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224039.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 7840945 is about 2800.1687449152. The cubic root of 7840945 is about 198.6656591369.

The spelling of 7840945 in words is "seven million, eight hundred forty thousand, nine hundred forty-five".