7648645 has 8 divisors (see below), whose sum is σ = 9196056. Its totient is φ = 6107136.

The previous prime is 7648643. The next prime is 7648649. The reversal of 7648645 is 5468467.

It can be written as a sum of positive squares in 4 ways, for example, as 1493284 + 6155361 = 1222^2 + 2481^2 .

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 7648645 - 2¹ = 7648643 is a prime.

It is an Ulam number.

It is a Duffinian number.

7648645 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7648598 and 7648607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7648643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2229 + ... + 4501.

It is an arithmetic number, because the mean of its divisors is an integer number (1149507).

Almost surely, 2^7648645 is an apocalyptic number.

It is an amenable number.

7648645 is a deficient number, since it is larger than the sum of its proper divisors (1547411).

7648645 is a wasteful number, since it uses less digits than its factorization.

7648645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951.

The product of its digits is 161280, while the sum is 40.

The square root of 7648645 is about 2765.6183756983. The cubic root of 7648645 is about 197.0280994386.

It can be divided in two parts, 764 and 8645, that added together give a square (9409 = 97²).

The spelling of 7648645 in words is "seven million, six hundred forty-eight thousand, six hundred forty-five".