72049448 has 8 divisors (see below), whose sum is σ = 135092730. Its totient is φ = 36024720.

The previous prime is 72049447. The next prime is 72049457. The reversal of 72049448 is 84494027.

It can be written as a sum of positive squares in only one way, i.e., 70930084 + 1119364 = 8422^2 + 1058^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×72049448² = 10382245914209408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72049441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4503083 + ... + 4503098.

Almost surely, 2^72049448 is an apocalyptic number.

It is an amenable number.

72049448 is a deficient number, since it is larger than the sum of its proper divisors (63043282).

72049448 is a wasteful number, since it uses less digits than its factorization.

72049448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9006187 (or 9006183 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 72049448 is about 8488.1946254784. The cubic root of 72049448 is about 416.1119798395. Note that the first 3 decimals are identical.

The spelling of 72049448 in words is "seventy-two million, forty-nine thousand, four hundred forty-eight".