7640423 has 12 divisors (see below), whose sum is σ = 8938512. Its totient is φ = 6511680.

The previous prime is 7640419. The next prime is 7640443. The reversal of 7640423 is 3240467.

It is a happy number.

It is not a de Polignac number, because 7640423 - 2² = 7640419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7640392 and 7640401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640443) 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 11 ways as a sum of consecutive naturals, for example, 11486 + ... + 12132.

It is an arithmetic number, because the mean of its divisors is an integer number (744876).

Almost surely, 2^7640423 is an apocalyptic number.

7640423 is a deficient number, since it is larger than the sum of its proper divisors (1298089).

7640423 is a wasteful number, since it uses less digits than its factorization.

7640423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 7640423 is about 2764.1315091725. The cubic root of 7640423 is about 196.9574749098.

The spelling of 7640423 in words is "seven million, six hundred forty thousand, four hundred twenty-three".