7998385 has 4 divisors (see below), whose sum is σ = 9598068. Its totient is φ = 6398704.

The previous prime is 7998383. The next prime is 7998409. The reversal of 7998385 is 5838997.

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 2471184 + 5527201 = 1572^2 + 2351^2 .

It is a cyclic number.

It is not a de Polignac number, because 7998385 - 2¹ = 7998383 is a prime.

It is a Smith number, since the sum of its digits (49) 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 (7998383) 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, 799834 + ... + 799843.

It is an arithmetic number, because the mean of its divisors is an integer number (2399517).

Almost surely, 2^7998385 is an apocalyptic number.

It is an amenable number.

7998385 is a deficient number, since it is larger than the sum of its proper divisors (1599683).

7998385 is a wasteful number, since it uses less digits than its factorization.

7998385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599682.

The product of its digits is 544320, while the sum is 49.

The square root of 7998385 is about 2828.1416159733. The cubic root of 7998385 is about 199.9865407609.

The spelling of 7998385 in words is "seven million, nine hundred ninety-eight thousand, three hundred eighty-five".