28751448 has 32 divisors (see below), whose sum is σ = 78413760. Its totient is φ = 8712480.

The previous prime is 28751447. The next prime is 28751453. The reversal of 28751448 is 84415782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28751447) 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, 54190 + ... + 54717.

It is an arithmetic number, because the mean of its divisors is an integer number (2450430).

Almost surely, 2^28751448 is an apocalyptic number.

It is an amenable number.

28751448 is an abundant number, since it is smaller than the sum of its proper divisors (49662312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28751448 is a wasteful number, since it uses less digits than its factorization.

28751448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108927 (or 108923 counting only the distinct ones).

The product of its digits is 71680, while the sum is 39.

The square root of 28751448 is about 5362.0376723779. The cubic root of 28751448 is about 306.3514267408.

The spelling of 28751448 in words is "twenty-eight million, seven hundred fifty-one thousand, four hundred forty-eight".