28523088 has 90 divisors (see below), whose sum is σ = 87795162. Its totient is φ = 8638080.

The previous prime is 28523083. The next prime is 28523101. The reversal of 28523088 is 88032582.

It can be written as a sum of positive squares in only one way, i.e., 16744464 + 11778624 = 4092^2 + 3432^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28523081) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16606 + ... + 18242.

Almost surely, 2^28523088 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 28523088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43897581).

28523088 is an abundant number, since it is smaller than the sum of its proper divisors (59272074).

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

28523088 is a wasteful number, since it uses less digits than its factorization.

28523088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673 (or 1653 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 28523088 is about 5340.7010775740. The cubic root of 28523088 is about 305.5381987178.

The spelling of 28523088 in words is "twenty-eight million, five hundred twenty-three thousand, eighty-eight".