72784023 has 16 divisors (see below), whose sum is σ = 105530880. Its totient is φ = 44352864.

The previous prime is 72784013. The next prime is 72784037. The reversal of 72784023 is 32048727.

It is not a de Polignac number, because 72784023 - 2⁴ = 72784007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72784013) 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, 5043 + ... + 13076.

It is an arithmetic number, because the mean of its divisors is an integer number (6595680).

Almost surely, 2^72784023 is an apocalyptic number.

72784023 is a deficient number, since it is larger than the sum of its proper divisors (32746857).

72784023 is a wasteful number, since it uses less digits than its factorization.

72784023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18238.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 72784023 is about 8531.3552850646. The cubic root of 72784023 is about 417.5213475883.

The spelling of 72784023 in words is "seventy-two million, seven hundred eighty-four thousand, twenty-three".