72028799 has 4 divisors (see below), whose sum is σ = 72666336. Its totient is φ = 71391264.

The previous prime is 72028787. The next prime is 72028843. The reversal of 72028799 is 99782027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72028799 - 2⁸ = 72028543 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 (72028729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318599 + ... + 318824.

It is an arithmetic number, because the mean of its divisors is an integer number (18166584).

Almost surely, 2^72028799 is an apocalyptic number.

72028799 is a deficient number, since it is larger than the sum of its proper divisors (637537).

72028799 is a wasteful number, since it uses less digits than its factorization.

72028799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637536.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 72028799 is about 8486.9782019279. The cubic root of 72028799 is about 416.0722241926.

It can be divided in two parts, 72028 and 799, that added together give a palindrome (72827).

The spelling of 72028799 in words is "seventy-two million, twenty-eight thousand, seven hundred ninety-nine".