7648945 has 8 divisors (see below), whose sum is σ = 9202536. Its totient is φ = 6103296.

The previous prime is 7648943. The next prime is 7648951. The reversal of 7648945 is 5498467.

It can be written as a sum of positive squares in 4 ways, for example, as 552049 + 7096896 = 743^2 + 2664^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7648945 - 2¹ = 7648943 is a prime.

It is a super-2 number, since 2×7648945² = 117012719226050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7648943) 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 7 ways as a sum of consecutive naturals, for example, 399 + ... + 3931.

It is an arithmetic number, because the mean of its divisors is an integer number (1150317).

Almost surely, 2^7648945 is an apocalyptic number.

It is an amenable number.

7648945 is a deficient number, since it is larger than the sum of its proper divisors (1553591).

7648945 is a wasteful number, since it uses less digits than its factorization.

7648945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971.

The product of its digits is 241920, while the sum is 43.

The square root of 7648945 is about 2765.6726125845. The cubic root of 7648945 is about 197.0306753919.

The spelling of 7648945 in words is "seven million, six hundred forty-eight thousand, nine hundred forty-five".