28720288743 has 8 divisors (see below), whose sum is σ = 38416063728. Its totient is φ = 19085686464.

The previous prime is 28720288687. The next prime is 28720288757. The reversal of 28720288743 is 34788202782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28720288743 - 2¹⁷ = 28720157671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28720288763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15292080 + ... + 15293957.

It is an arithmetic number, because the mean of its divisors is an integer number (4802007966).

Almost surely, 2^28720288743 is an apocalyptic number.

28720288743 is a deficient number, since it is larger than the sum of its proper divisors (9695774985).

28720288743 is a wasteful number, since it uses less digits than its factorization.

28720288743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30586353.

The product of its (nonzero) digits is 2408448, while the sum is 51.

The spelling of 28720288743 in words is "twenty-eight billion, seven hundred twenty million, two hundred eighty-eight thousand, seven hundred forty-three".