7453221398 has 16 divisors (see below), whose sum is σ = 12908674464. Its totient is φ = 3161306880.

The previous prime is 7453221389. The next prime is 7453221403. The reversal of 7453221398 is 8931223547.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2742833 + ... + 2745548.

It is an arithmetic number, because the mean of its divisors is an integer number (806792154).

Almost surely, 2^7453221398 is an apocalyptic number.

7453221398 is a deficient number, since it is larger than the sum of its proper divisors (5455453066).

7453221398 is a wasteful number, since it uses less digits than its factorization.

7453221398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5488487.

The product of its digits is 362880, while the sum is 44.

The square root of 7453221398 is about 86332.0415488942. The cubic root of 7453221398 is about 1953.3557294612.

The spelling of 7453221398 in words is "seven billion, four hundred fifty-three million, two hundred twenty-one thousand, three hundred ninety-eight".