28473999 has 4 divisors (see below), whose sum is σ = 37965336. Its totient is φ = 18982664.

The previous prime is 28473959. The next prime is 28474003. The reversal of 28473999 is 99937482.

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 28473999 - 2¹³ = 28465807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28473959) 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, 4745664 + ... + 4745669.

It is an arithmetic number, because the mean of its divisors is an integer number (9491334).

Almost surely, 2^28473999 is an apocalyptic number.

28473999 is a deficient number, since it is larger than the sum of its proper divisors (9491337).

28473999 is an equidigital number, since it uses as much as digits as its factorization.

28473999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9491336.

The product of its digits is 979776, while the sum is 51.

The square root of 28473999 is about 5336.1033535718. The cubic root of 28473999 is about 305.3628182543.

The spelling of 28473999 in words is "twenty-eight million, four hundred seventy-three thousand, nine hundred ninety-nine".