7428289 has 4 divisors (see below), whose sum is σ = 8103600. Its totient is φ = 6752980.

The previous prime is 7428283. The next prime is 7428301. The reversal of 7428289 is 9828247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7428289 - 2¹³ = 7420097 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 Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7428283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337639 + ... + 337660.

It is an arithmetic number, because the mean of its divisors is an integer number (2025900).

Almost surely, 2^7428289 is an apocalyptic number.

It is an amenable number.

7428289 is a deficient number, since it is larger than the sum of its proper divisors (675311).

7428289 is a wasteful number, since it uses less digits than its factorization.

7428289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675310.

The product of its digits is 64512, while the sum is 40.

The square root of 7428289 is about 2725.4887635065. The cubic root of 7428289 is about 195.1175184675.

The spelling of 7428289 in words is "seven million, four hundred twenty-eight thousand, two hundred eighty-nine".