72543398 has 16 divisors (see below), whose sum is σ = 111023136. Its totient is φ = 35542080.

The previous prime is 72543397. The next prime is 72543407. The reversal of 72543398 is 89334527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72543397) 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 in 7 ways as a sum of consecutive naturals, for example, 23090 + ... + 26042.

It is an arithmetic number, because the mean of its divisors is an integer number (6938946).

Almost surely, 2^72543398 is an apocalyptic number.

72543398 is a deficient number, since it is larger than the sum of its proper divisors (38479738).

72543398 is a wasteful number, since it uses less digits than its factorization.

72543398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199.

The product of its digits is 181440, while the sum is 41.

The square root of 72543398 is about 8517.2412200195. The cubic root of 72543398 is about 417.0607291357.

The spelling of 72543398 in words is "seventy-two million, five hundred forty-three thousand, three hundred ninety-eight".