7889445 has 24 divisors (see below), whose sum is σ = 14480856. Its totient is φ = 3959808.

The previous prime is 7889443. The next prime is 7889459. The reversal of 7889445 is 5449887.

It can be written as a sum of positive squares in 4 ways, for example, as 1340964 + 6548481 = 1158^2 + 2559^2 .

It is not a de Polignac number, because 7889445 - 2¹ = 7889443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 7889445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7889443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4392 + ... + 5921.

It is an arithmetic number, because the mean of its divisors is an integer number (603369).

Almost surely, 2^7889445 is an apocalyptic number.

It is an amenable number.

7889445 is a deficient number, since it is larger than the sum of its proper divisors (6591411).

7889445 is a wasteful number, since it uses less digits than its factorization.

7889445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10341 (or 10338 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 7889445 is about 2808.8155866842. The cubic root of 7889445 is about 199.0744315562.

The spelling of 7889445 in words is "seven million, eight hundred eighty-nine thousand, four hundred forty-five".