28477443 has 8 divisors (see below), whose sum is σ = 38064400. Its totient is φ = 18937728.

The previous prime is 28477439. The next prime is 28477459. The reversal of 28477443 is 34477482.

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

It is not a de Polignac number, because 28477443 - 2² = 28477439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28477403) 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, 10378 + ... + 12831.

It is an arithmetic number, because the mean of its divisors is an integer number (4758050).

Almost surely, 2^28477443 is an apocalyptic number.

28477443 is a deficient number, since it is larger than the sum of its proper divisors (9586957).

28477443 is a wasteful number, since it uses less digits than its factorization.

28477443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23621.

The product of its digits is 150528, while the sum is 39.

The square root of 28477443 is about 5336.4260512069. The cubic root of 28477443 is about 305.3751292185.

Adding to 28477443 its sum of digits (39), we get a palindrome (28477482).

It can be divided in two parts, 28477 and 443, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 28477443 in words is "twenty-eight million, four hundred seventy-seven thousand, four hundred forty-three".