28446469 has 4 divisors (see below), whose sum is σ = 29683296. Its totient is φ = 27209644.

The previous prime is 28446461. The next prime is 28446487. The reversal of 28446469 is 96464482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28446469 - 2³ = 28446461 is a prime.

It is a super-2 number, since 2×28446469² = 1618403197135922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28446461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618379 + ... + 618424.

It is an arithmetic number, because the mean of its divisors is an integer number (7420824).

Almost surely, 2^28446469 is an apocalyptic number.

It is an amenable number.

28446469 is a deficient number, since it is larger than the sum of its proper divisors (1236827).

28446469 is a wasteful number, since it uses less digits than its factorization.

28446469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236826.

The product of its digits is 331776, while the sum is 43.

The square root of 28446469 is about 5333.5231320395. The cubic root of 28446469 is about 305.2643734807.

The spelling of 28446469 in words is "twenty-eight million, four hundred forty-six thousand, four hundred sixty-nine".