7648749 has 20 divisors (see below), whose sum is σ = 11565180. Its totient is φ = 5037120.

The previous prime is 7648747. The next prime is 7648757. The reversal of 7648749 is 9478467.

It can be written as a sum of positive squares in 2 ways, for example, as 3175524 + 4473225 = 1782^2 + 2115^2 .

It is not a de Polignac number, because 7648749 - 2¹ = 7648747 is a prime.

It is a super-2 number, since 2×7648749² = 117006722530002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7648747) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6679 + ... + 7739.

It is an arithmetic number, because the mean of its divisors is an integer number (578259).

Almost surely, 2^7648749 is an apocalyptic number.

It is an amenable number.

7648749 is a deficient number, since it is larger than the sum of its proper divisors (3916431).

7648749 is a wasteful number, since it uses less digits than its factorization.

7648749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162 (or 1153 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 7648749 is about 2765.6371779393. The cubic root of 7648749 is about 197.0289924434.

The spelling of 7648749 in words is "seven million, six hundred forty-eight thousand, seven hundred forty-nine".