28323488 has 48 divisors (see below), whose sum is σ = 60238080. Its totient is φ = 13069056.

The previous prime is 28323487. The next prime is 28323499. The reversal of 28323488 is 88432382.

It is a super-2 number, since 2×28323488² = 1604439944972288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28323487) 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, 20681 + ... + 22007.

It is an arithmetic number, because the mean of its divisors is an integer number (1254960).

Almost surely, 2^28323488 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 28323488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30119040).

28323488 is an abundant number, since it is smaller than the sum of its proper divisors (31914592).

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

28323488 is a wasteful number, since it uses less digits than its factorization.

28323488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389 (or 1381 counting only the distinct ones).

The product of its digits is 73728, while the sum is 38.

The square root of 28323488 is about 5321.9815858381. The cubic root of 28323488 is about 304.8238273109.

The spelling of 28323488 in words is "twenty-eight million, three hundred twenty-three thousand, four hundred eighty-eight".