28238760 has 128 divisors (see below), whose sum is σ = 102729600. Its totient is φ = 6842880.

The previous prime is 28238741. The next prime is 28238767. The reversal of 28238760 is 6783282.

28238760 = T₁₁₅ + T₁₁₆ + ... + T₅₅₄.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (28238767) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10692 + ... + 13068.

It is an arithmetic number, because the mean of its divisors is an integer number (802575).

Almost surely, 2^28238760 is an apocalyptic number.

28238760 is a gapful number since it is divisible by the number (20) 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 28238760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51364800).

28238760 is an abundant number, since it is smaller than the sum of its proper divisors (74490840).

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

28238760 is a wasteful number, since it uses less digits than its factorization.

28238760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2398 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28238760 is about 5314.0154309147. The cubic root of 28238760 is about 304.5195697098.

The spelling of 28238760 in words is "twenty-eight million, two hundred thirty-eight thousand, seven hundred sixty".