28947448 has 16 divisors (see below), whose sum is σ = 54337680. Its totient is φ = 14457408.

The previous prime is 28947437. The next prime is 28947449. The reversal of 28947448 is 84474982.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28947398 and 28947407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28947449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9036 + ... + 11812.

It is an arithmetic number, because the mean of its divisors is an integer number (3396105).

Almost surely, 2^28947448 is an apocalyptic number.

It is an amenable number.

28947448 is a deficient number, since it is larger than the sum of its proper divisors (25390232).

28947448 is a wasteful number, since it uses less digits than its factorization.

28947448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4086 (or 4082 counting only the distinct ones).

The product of its digits is 516096, while the sum is 46.

The square root of 28947448 is about 5380.2832639184. The cubic root of 28947448 is about 307.0459882936.

The spelling of 28947448 in words is "twenty-eight million, nine hundred forty-seven thousand, four hundred forty-eight".