7940445 has 16 divisors (see below), whose sum is σ = 13452480. Its totient is φ = 3985664.

The previous prime is 7940437. The next prime is 7940447. The reversal of 7940445 is 5440497.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7940445 - 2³ = 7940437 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

7940445 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7940447) 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 15 ways as a sum of consecutive naturals, for example, 15315 + ... + 15824.

It is an arithmetic number, because the mean of its divisors is an integer number (840780).

Almost surely, 2^7940445 is an apocalyptic number.

It is an amenable number.

7940445 is a deficient number, since it is larger than the sum of its proper divisors (5512035).

7940445 is a wasteful number, since it uses less digits than its factorization.

7940445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31164.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 7940445 is about 2817.8795219100. The cubic root of 7940445 is about 199.5024716875.

It can be divided in two parts, 7940 and 445, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 7940445 in words is "seven million, nine hundred forty thousand, four hundred forty-five".