7640945 has 32 divisors (see below), whose sum is σ = 10886400. Its totient is φ = 5094144.

The previous prime is 7640933. The next prime is 7640987. The reversal of 7640945 is 5490467.

It is a cyclic number.

It is not a de Polignac number, because 7640945 - 2⁴ = 7640929 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 28271 + ... + 28539.

It is an arithmetic number, because the mean of its divisors is an integer number (340200).

Almost surely, 2^7640945 is an apocalyptic number.

It is an amenable number.

7640945 is a deficient number, since it is larger than the sum of its proper divisors (3245455).

7640945 is a wasteful number, since it uses less digits than its factorization.

7640945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329.

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

The square root of 7640945 is about 2764.2259314318. The cubic root of 7640945 is about 196.9619602400.

The spelling of 7640945 in words is "seven million, six hundred forty thousand, nine hundred forty-five".