72784148 has 6 divisors (see below), whose sum is σ = 127372266. Its totient is φ = 36392072.

The previous prime is 72784141. The next prime is 72784207. The reversal of 72784148 is 84148727.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 43059844 + 29724304 = 6562^2 + 5452^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72784141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9098015 + ... + 9098022.

It is an arithmetic number, because the mean of its divisors is an integer number (21228711).

Almost surely, 2^72784148 is an apocalyptic number.

It is an amenable number.

72784148 is a deficient number, since it is larger than the sum of its proper divisors (54588118).

72784148 is a wasteful number, since it uses less digits than its factorization.

72784148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18196041 (or 18196039 counting only the distinct ones).

The product of its digits is 100352, while the sum is 41.

The square root of 72784148 is about 8531.3626109784. The cubic root of 72784148 is about 417.5215866066.

The spelling of 72784148 in words is "seventy-two million, seven hundred eighty-four thousand, one hundred forty-eight".