28263088 has 40 divisors (see below), whose sum is σ = 63107072. Its totient is φ = 12011328.

The previous prime is 28263071. The next prime is 28263091. The reversal of 28263088 is 88036282.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13231 + ... + 15217.

Almost surely, 2^28263088 is an apocalyptic number.

28263088 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28263088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31553536).

28263088 is an abundant number, since it is smaller than the sum of its proper divisors (34843984).

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

28263088 is a wasteful number, since it uses less digits than its factorization.

28263088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129 (or 2123 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 28263088 is about 5316.3039792698. The cubic root of 28263088 is about 304.6069935869.

The spelling of 28263088 in words is "twenty-eight million, two hundred sixty-three thousand, eighty-eight".