72449931 has 8 divisors (see below), whose sum is σ = 100800000. Its totient is φ = 46199912.

The previous prime is 72449921. The next prime is 72449933. The reversal of 72449931 is 13994427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72449931 - 2¹¹ = 72447883 is a prime.

It is a super-2 number, since 2×72449931² = 10497985003809522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72449931.

It is not an unprimeable number, because it can be changed into a prime (72449933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524931 + ... + 525068.

It is an arithmetic number, because the mean of its divisors is an integer number (12600000).

Almost surely, 2^72449931 is an apocalyptic number.

72449931 is a deficient number, since it is larger than the sum of its proper divisors (28350069).

72449931 is a wasteful number, since it uses less digits than its factorization.

72449931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050025.

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

The square root of 72449931 is about 8511.7525222483. The cubic root of 72449931 is about 416.8815344751.

The spelling of 72449931 in words is "seventy-two million, four hundred forty-nine thousand, nine hundred thirty-one".