7640217 has 16 divisors (see below), whose sum is σ = 12190080. Its totient is φ = 4701456.

The previous prime is 7640183. The next prime is 7640219. The reversal of 7640217 is 7120467.

7640217 is a `hidden beast` number, since 7 + 640 + 2 + 17 = 666.

It is not a de Polignac number, because 7640217 - 2¹⁰ = 7639193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (7640219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10533 + ... + 11234.

It is an arithmetic number, because the mean of its divisors is an integer number (761880).

Almost surely, 2^7640217 is an apocalyptic number.

It is an amenable number.

7640217 is a deficient number, since it is larger than the sum of its proper divisors (4549863).

7640217 is a wasteful number, since it uses less digits than its factorization.

7640217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21789 (or 21783 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 7640217 is about 2764.0942458607. The cubic root of 7640217 is about 196.9557047807.

The spelling of 7640217 in words is "seven million, six hundred forty thousand, two hundred seventeen".