28650473 has 4 divisors (see below), whose sum is σ = 29078160. Its totient is φ = 28222788.

The previous prime is 28650467. The next prime is 28650487. The reversal of 28650473 is 37405682.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 28650473 - 2⁸ = 28650217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28650403) 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, 213743 + ... + 213876.

It is an arithmetic number, because the mean of its divisors is an integer number (7269540).

Almost surely, 2^28650473 is an apocalyptic number.

It is an amenable number.

28650473 is a deficient number, since it is larger than the sum of its proper divisors (427687).

28650473 is an equidigital number, since it uses as much as digits as its factorization.

28650473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427686.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 28650473 is about 5352.6136606335. The cubic root of 28650473 is about 305.9923709776.

The spelling of 28650473 in words is "twenty-eight million, six hundred fifty thousand, four hundred seventy-three".