72444602 has 4 divisors (see below), whose sum is σ = 108666906. Its totient is φ = 36222300.

The previous prime is 72444601. The next prime is 72444607. The reversal of 72444602 is 20644427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20644427 = 631 ⋅32717.

It can be written as a sum of positive squares in only one way, i.e., 52722121 + 19722481 = 7261^2 + 4441^2 .

It is not an unprimeable number, because it can be changed into a prime (72444601) 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, 18111149 + ... + 18111152.

Almost surely, 2^72444602 is an apocalyptic number.

72444602 is a deficient number, since it is larger than the sum of its proper divisors (36222304).

72444602 is a wasteful number, since it uses less digits than its factorization.

72444602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36222303.

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 72444602 is about 8511.4394787251. The cubic root of 72444602 is about 416.8713130889.

The spelling of 72444602 in words is "seventy-two million, four hundred forty-four thousand, six hundred two".