72028791 has 16 divisors (see below), whose sum is σ = 112326400. Its totient is φ = 45491544.

The previous prime is 72028787. The next prime is 72028843. The reversal of 72028791 is 19782027.

It is not a de Polignac number, because 72028791 - 2² = 72028787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72028991) 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, 69691 + ... + 70716.

It is an arithmetic number, because the mean of its divisors is an integer number (7020400).

Almost surely, 2^72028791 is an apocalyptic number.

72028791 is a deficient number, since it is larger than the sum of its proper divisors (40297609).

72028791 is a wasteful number, since it uses less digits than its factorization.

72028791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140435 (or 140429 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 72028791 is about 8486.9777306177. The cubic root of 72028791 is about 416.0722087887.

The spelling of 72028791 in words is "seventy-two million, twenty-eight thousand, seven hundred ninety-one".