28455071 has 4 divisors (see below), whose sum is σ = 29692272. Its totient is φ = 27217872.

The previous prime is 28455043. The next prime is 28455079. The reversal of 28455071 is 17055482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17055482 = 2 ⋅8527741.

It is a cyclic number.

It is not a de Polignac number, because 28455071 - 2¹⁰ = 28454047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28455079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618566 + ... + 618611.

It is an arithmetic number, because the mean of its divisors is an integer number (7423068).

Almost surely, 2^28455071 is an apocalyptic number.

28455071 is a deficient number, since it is larger than the sum of its proper divisors (1237201).

28455071 is a wasteful number, since it uses less digits than its factorization.

28455071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237200.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 28455071 is about 5334.3294798878. The cubic root of 28455071 is about 305.2951402694.

It can be divided in two parts, 284 and 55071, that added together give a palindrome (55355).

The spelling of 28455071 in words is "twenty-eight million, four hundred fifty-five thousand, seventy-one".