72449391 has 12 divisors (see below), whose sum is σ = 112370712. Its totient is φ = 41399568.

The previous prime is 72449389. The next prime is 72449407. The reversal of 72449391 is 19394427.

It is not a de Polignac number, because 72449391 - 2¹ = 72449389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72449341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 246280 + ... + 246573.

It is an arithmetic number, because the mean of its divisors is an integer number (9364226).

Almost surely, 2^72449391 is an apocalyptic number.

72449391 is a deficient number, since it is larger than the sum of its proper divisors (39921321).

72449391 is a wasteful number, since it uses less digits than its factorization.

72449391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492870 (or 492863 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 72449391 is about 8511.7208013421. The cubic root of 72449391 is about 416.8804987410.

The spelling of 72449391 in words is "seventy-two million, four hundred forty-nine thousand, three hundred ninety-one".