28471267 has 4 divisors (see below), whose sum is σ = 31059576. Its totient is φ = 25882960.

The previous prime is 28471249. The next prime is 28471271. The reversal of 28471267 is 76217482.

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 28471267 - 2¹¹ = 28469219 is a prime.

It is a super-2 number, since 2×28471267² = 1621226089170578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28471067) 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, 1294138 + ... + 1294159.

It is an arithmetic number, because the mean of its divisors is an integer number (7764894).

Almost surely, 2^28471267 is an apocalyptic number.

28471267 is a deficient number, since it is larger than the sum of its proper divisors (2588309).

28471267 is a wasteful number, since it uses less digits than its factorization.

28471267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2588308.

The product of its digits is 37632, while the sum is 37.

The square root of 28471267 is about 5335.8473553879. The cubic root of 28471267 is about 305.3530517078.

It can be divided in two parts, 2847 and 1267, that added together give a palindrome (4114).

The spelling of 28471267 in words is "twenty-eight million, four hundred seventy-one thousand, two hundred sixty-seven".