28019088 has 80 divisors (see below), whose sum is σ = 81542400. Its totient is φ = 9210240.

The previous prime is 28019081. The next prime is 28019099. The reversal of 28019088 is 88091082.

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 (28019081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33718 + ... + 34538.

It is an arithmetic number, because the mean of its divisors is an integer number (1019280).

Almost surely, 2^28019088 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 28019088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40771200).

28019088 is an abundant number, since it is smaller than the sum of its proper divisors (53523312).

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

28019088 is a wasteful number, since it uses less digits than its factorization.

28019088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 28019088 is about 5293.3059613062. The cubic root of 28019088 is about 303.7278843828.

The spelling of 28019088 in words is "twenty-eight million, nineteen thousand, eighty-eight".