72445052 has 12 divisors (see below), whose sum is σ = 127705200. Its totient is φ = 35957856.

The previous prime is 72445049. The next prime is 72445057. The reversal of 72445052 is 25054427.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72445057) 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 3 ways as a sum of consecutive naturals, for example, 65552 + ... + 66647.

It is an arithmetic number, because the mean of its divisors is an integer number (10642100).

Almost surely, 2^72445052 is an apocalyptic number.

It is an amenable number.

72445052 is a deficient number, since it is larger than the sum of its proper divisors (55260148).

72445052 is a wasteful number, since it uses less digits than its factorization.

72445052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132340 (or 132338 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 72445052 is about 8511.4659136955. The cubic root of 72445052 is about 416.8721762391.

Adding to 72445052 its reverse (25054427), we get a palindrome (97499479).

The spelling of 72445052 in words is "seventy-two million, four hundred forty-five thousand, fifty-two".