7538845 has 4 divisors (see below), whose sum is σ = 9046620. Its totient is φ = 6031072.

The previous prime is 7538827. The next prime is 7538849. The reversal of 7538845 is 5488357.

7538845 = 1941² + 1942².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3771364 + 3767481 = 1942^2 + 1941^2 .

It is a cyclic number.

It is not a de Polignac number, because 7538845 - 2⁵ = 7538813 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 7538798 and 7538807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7538849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753880 + ... + 753889.

It is an arithmetic number, because the mean of its divisors is an integer number (2261655).

Almost surely, 2^7538845 is an apocalyptic number.

7538845 is the 1942-nd centered square number.

It is an amenable number.

7538845 is a deficient number, since it is larger than the sum of its proper divisors (1507775).

7538845 is a wasteful number, since it uses less digits than its factorization.

7538845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507774.

The product of its digits is 134400, while the sum is 40.

The square root of 7538845 is about 2745.6957223990. The cubic root of 7538845 is about 196.0807403712.

The spelling of 7538845 in words is "seven million, five hundred thirty-eight thousand, eight hundred forty-five".