28457088 has 64 divisors (see below), whose sum is σ = 82473120. Its totient is φ = 8622080.

The previous prime is 28457071. The next prime is 28457089. The reversal of 28457088 is 88075482.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28457089) 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, 856 + ... + 7592.

Almost surely, 2^28457088 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 28457088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41236560).

28457088 is an abundant number, since it is smaller than the sum of its proper divisors (54016032).

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

28457088 is a wasteful number, since it uses less digits than its factorization.

28457088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6765 (or 6753 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 42.

The square root of 28457088 is about 5334.5185349758. The cubic root of 28457088 is about 305.3023535794.

The spelling of 28457088 in words is "twenty-eight million, four hundred fifty-seven thousand, eighty-eight".