28998743 has 4 divisors (see below), whose sum is σ = 29407248. Its totient is φ = 28590240.

The previous prime is 28998737. The next prime is 28998751. The reversal of 28998743 is 34789982.

It is a happy number.

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 28998743 - 2⁶ = 28998679 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28998691 and 28998700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28998703) 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, 204146 + ... + 204287.

It is an arithmetic number, because the mean of its divisors is an integer number (7351812).

Almost surely, 2^28998743 is an apocalyptic number.

28998743 is a deficient number, since it is larger than the sum of its proper divisors (408505).

28998743 is an equidigital number, since it uses as much as digits as its factorization.

28998743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408504.

The product of its digits is 870912, while the sum is 50.

The square root of 28998743 is about 5385.0480963497. The cubic root of 28998743 is about 307.2272435363.

The spelling of 28998743 in words is "twenty-eight million, nine hundred ninety-eight thousand, seven hundred forty-three".