7445398 has 4 divisors (see below), whose sum is σ = 11168100. Its totient is φ = 3722698.

The previous prime is 7445393. The next prime is 7445437. The reversal of 7445398 is 8935447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8935447 = 349 ⋅25603.

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 self number, because there is not a number n which added to its sum of digits gives 7445398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7445393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1861348 + ... + 1861351.

It is an arithmetic number, because the mean of its divisors is an integer number (2792025).

Almost surely, 2^7445398 is an apocalyptic number.

7445398 is a deficient number, since it is larger than the sum of its proper divisors (3722702).

7445398 is a wasteful number, since it uses less digits than its factorization.

7445398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722701.

The product of its digits is 120960, while the sum is 40.

The square root of 7445398 is about 2728.6256613907. The cubic root of 7445398 is about 195.2672032727.

The spelling of 7445398 in words is "seven million, four hundred forty-five thousand, three hundred ninety-eight".