28472267 has 4 divisors (see below), whose sum is σ = 28520400. Its totient is φ = 28424136.

The previous prime is 28472219. The next prime is 28472273. The reversal of 28472267 is 76227482.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76227482 = 2 ⋅38113741.

It is a cyclic number.

It is not a de Polignac number, because 28472267 - 2¹² = 28468171 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 28472267.

It is not an unprimeable number, because it can be changed into a prime (28472767) 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, 23168 + ... + 24365.

It is an arithmetic number, because the mean of its divisors is an integer number (7130100).

Almost surely, 2^28472267 is an apocalyptic number.

28472267 is a deficient number, since it is larger than the sum of its proper divisors (48133).

28472267 is an equidigital number, since it uses as much as digits as its factorization.

28472267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48132.

The product of its digits is 75264, while the sum is 38.

The square root of 28472267 is about 5335.9410603941. The cubic root of 28472267 is about 305.3566266509.

The spelling of 28472267 in words is "twenty-eight million, four hundred seventy-two thousand, two hundred sixty-seven".