7638745 has 16 divisors (see below), whose sum is σ = 9576000. Its totient is φ = 5842368.

The previous prime is 7638733. The next prime is 7638767. The reversal of 7638745 is 5478367.

It is a cyclic number.

It is not a de Polignac number, because 7638745 - 2⁹ = 7638233 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 7638698 and 7638707.

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 15 ways as a sum of consecutive naturals, for example, 19966 + ... + 20344.

It is an arithmetic number, because the mean of its divisors is an integer number (598500).

Almost surely, 2^7638745 is an apocalyptic number.

It is an amenable number.

7638745 is a deficient number, since it is larger than the sum of its proper divisors (1937255).

7638745 is a wasteful number, since it uses less digits than its factorization.

7638745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552.

The product of its digits is 141120, while the sum is 40.

The square root of 7638745 is about 2763.8279613608. The cubic root of 7638745 is about 196.9430551654.

The spelling of 7638745 in words is "seven million, six hundred thirty-eight thousand, seven hundred forty-five".