72447441 has 16 divisors (see below), whose sum is σ = 105547008. Its totient is φ = 43837200.

The previous prime is 72447433. The next prime is 72447461. The reversal of 72447441 is 14474427.

It is a happy number.

It is not a de Polignac number, because 72447441 - 2³ = 72447433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (72447461) 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 15 ways as a sum of consecutive naturals, for example, 25410 + ... + 28116.

It is an arithmetic number, because the mean of its divisors is an integer number (6596688).

Almost surely, 2^72447441 is an apocalyptic number.

It is an amenable number.

72447441 is a deficient number, since it is larger than the sum of its proper divisors (33099567).

72447441 is a wasteful number, since it uses less digits than its factorization.

72447441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3532.

The product of its digits is 25088, while the sum is 33.

The square root of 72447441 is about 8511.6062526412. The cubic root of 72447441 is about 416.8767585473.

The spelling of 72447441 in words is "seventy-two million, four hundred forty-seven thousand, four hundred forty-one".