28396284 has 48 divisors (see below), whose sum is σ = 77280000. Its totient is φ = 8112048.

The previous prime is 28396267. The next prime is 28396289. The reversal of 28396284 is 48269382.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28396289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667 + ... + 7565.

It is an arithmetic number, because the mean of its divisors is an integer number (1610000).

Almost surely, 2^28396284 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 28396284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38640000).

28396284 is an abundant number, since it is smaller than the sum of its proper divisors (48883716).

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

28396284 is a wasteful number, since it uses less digits than its factorization.

28396284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6927 (or 6911 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 28396284 is about 5328.8163788969. The cubic root of 28396284 is about 305.0847529406.

It can be divided in two parts, 28396 and 284, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 28396284 in words is "twenty-eight million, three hundred ninety-six thousand, two hundred eighty-four".