72843784 has 32 divisors (see below), whose sum is σ = 148176000. Its totient is φ = 33371712.

The previous prime is 72843773. The next prime is 72843809. The reversal of 72843784 is 48734827.

It is a self number, because there is not a number n which added to its sum of digits gives 72843784.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11937 + ... + 16975.

It is an arithmetic number, because the mean of its divisors is an integer number (4630500).

Almost surely, 2^72843784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72843784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74088000).

72843784 is an abundant number, since it is smaller than the sum of its proper divisors (75332216).

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

72843784 is a wasteful number, since it uses less digits than its factorization.

72843784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197 (or 5193 counting only the distinct ones).

The product of its digits is 301056, while the sum is 43.

The square root of 72843784 is about 8534.8569993879. The cubic root of 72843784 is about 417.6355881700.

The spelling of 72843784 in words is "seventy-two million, eight hundred forty-three thousand, seven hundred eighty-four".