28143448 has 32 divisors (see below), whose sum is σ = 54259920. Its totient is φ = 13680000.

The previous prime is 28143439. The next prime is 28143481. The reversal of 28143448 is 84434182.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49003 + ... + 49573.

Almost surely, 2^28143448 is an apocalyptic number.

It is an amenable number.

28143448 is a deficient number, since it is larger than the sum of its proper divisors (26116472).

28143448 is a wasteful number, since it uses less digits than its factorization.

28143448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 735 counting only the distinct ones).

The product of its digits is 24576, while the sum is 34.

The square root of 28143448 is about 5305.0398678992. The cubic root of 28143448 is about 304.1765767793.

The spelling of 28143448 in words is "twenty-eight million, one hundred forty-three thousand, four hundred forty-eight".