28445469 has 8 divisors (see below), whose sum is σ = 40844832. Its totient is φ = 17504880.

The previous prime is 28445467. The next prime is 28445479. The reversal of 28445469 is 96454482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28445469 - 2¹ = 28445467 is a prime.

It is a super-2 number, since 2×28445469² = 1618289413259922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28445469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28445467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364647 + ... + 364724.

It is an arithmetic number, because the mean of its divisors is an integer number (5105604).

Almost surely, 2^28445469 is an apocalyptic number.

It is an amenable number.

28445469 is a deficient number, since it is larger than the sum of its proper divisors (12399363).

28445469 is a wasteful number, since it uses less digits than its factorization.

28445469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729387.

The product of its digits is 276480, while the sum is 42.

The square root of 28445469 is about 5333.4293845517. The cubic root of 28445469 is about 305.2607963765.

It can be divided in two parts, 284 and 45469, that added together give a triangular number (45753 = T₃₀₂).

The spelling of 28445469 in words is "twenty-eight million, four hundred forty-five thousand, four hundred sixty-nine".