28457748 has 108 divisors (see below), whose sum is σ = 81332160. Its totient is φ = 8379360.

The previous prime is 28457743. The next prime is 28457749. The reversal of 28457748 is 84775482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28457743) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 204663 + ... + 204801.

Almost surely, 2^28457748 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28457748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40666080).

28457748 is an abundant number, since it is smaller than the sum of its proper divisors (52874412).

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

28457748 is a wasteful number, since it uses less digits than its factorization.

28457748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 202 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 28457748 is about 5334.5803958700. The cubic root of 28457748 is about 305.3047138349.

The spelling of 28457748 in words is "twenty-eight million, four hundred fifty-seven thousand, seven hundred forty-eight".