28798401 has 4 divisors (see below), whose sum is σ = 38397872. Its totient is φ = 19198932.

The previous prime is 28798379. The next prime is 28798417. The reversal of 28798401 is 10489782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28798401 - 2⁹ = 28797889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28798401.

It is not an unprimeable number, because it can be changed into a prime (28798201) 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, 4799731 + ... + 4799736.

It is an arithmetic number, because the mean of its divisors is an integer number (9599468).

Almost surely, 2^28798401 is an apocalyptic number.

It is an amenable number.

28798401 is a deficient number, since it is larger than the sum of its proper divisors (9599471).

28798401 is an equidigital number, since it uses as much as digits as its factorization.

28798401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9599470.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 28798401 is about 5366.4141659026. The cubic root of 28798401 is about 306.5181000340.

The spelling of 28798401 in words is "twenty-eight million, seven hundred ninety-eight thousand, four hundred one".