72447450 has 48 divisors (see below), whose sum is σ = 180363456. Its totient is φ = 19244800.

The previous prime is 72447433. The next prime is 72447461. The reversal of 72447450 is 5474427.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45874 + ... + 47426.

It is an arithmetic number, because the mean of its divisors is an integer number (3757572).

Almost surely, 2^72447450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72447450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90181728).

72447450 is an abundant number, since it is smaller than the sum of its proper divisors (107916006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72447450 is a wasteful number, since it uses less digits than its factorization.

72447450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879 (or 1874 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 33.

The square root of 72447450 is about 8511.6067813310. The cubic root of 72447450 is about 416.8767758099.

The spelling of 72447450 in words is "seventy-two million, four hundred forty-seven thousand, four hundred fifty".