72072447 has 8 divisors (see below), whose sum is σ = 96262656. Its totient is φ = 47965272.

The previous prime is 72072443. The next prime is 72072449. The reversal of 72072447 is 74427027.

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

It is not a de Polignac number, because 72072447 - 2² = 72072443 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72072443) 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, 18703 + ... + 22224.

It is an arithmetic number, because the mean of its divisors is an integer number (12032832).

Almost surely, 2^72072447 is an apocalyptic number.

72072447 is a deficient number, since it is larger than the sum of its proper divisors (24190209).

72072447 is a wasteful number, since it uses less digits than its factorization.

72072447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41517.

The product of its (nonzero) digits is 21952, while the sum is 33.

The square root of 72072447 is about 8489.5492813223. The cubic root of 72072447 is about 416.1562510152.

The spelling of 72072447 in words is "seventy-two million, seventy-two thousand, four hundred forty-seven".