28480453 has 4 divisors (see below), whose sum is σ = 28497420. Its totient is φ = 28463488.

The previous prime is 28480429. The next prime is 28480469. The reversal of 28480453 is 35408482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5841889 + 22638564 = 2417^2 + 4758^2 .

It is a cyclic number.

It is not a de Polignac number, because 28480453 - 2¹⁷ = 28349381 is a prime.

It is a super-2 number, since 2×28480453² = 1622272406170418, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28480493) 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, 5650 + ... + 9427.

It is an arithmetic number, because the mean of its divisors is an integer number (7124355).

Almost surely, 2^28480453 is an apocalyptic number.

It is an amenable number.

28480453 is a deficient number, since it is larger than the sum of its proper divisors (16967).

28480453 is a wasteful number, since it uses less digits than its factorization.

28480453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16966.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 28480453 is about 5336.7080677137. The cubic root of 28480453 is about 305.3858879882.

The spelling of 28480453 in words is "twenty-eight million, four hundred eighty thousand, four hundred fifty-three".