28972448 has 24 divisors (see below), whose sum is σ = 57218112. Its totient is φ = 14440896.

The previous prime is 28972423. The next prime is 28972451. The reversal of 28972448 is 84427982.

It is a super-2 number, since 2×28972448² = 1678805486225408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28972399 and 28972408.

It is an unprimeable number.

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, 10511 + ... + 12977.

It is an arithmetic number, because the mean of its divisors is an integer number (2384088).

Almost surely, 2^28972448 is an apocalyptic number.

It is an amenable number.

28972448 is a deficient number, since it is larger than the sum of its proper divisors (28245664).

28972448 is a wasteful number, since it uses less digits than its factorization.

28972448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844 (or 2836 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 28972448 is about 5382.6060602649. The cubic root of 28972448 is about 307.1343546437.

The spelling of 28972448 in words is "twenty-eight million, nine hundred seventy-two thousand, four hundred forty-eight".