28163400 has 96 divisors (see below), whose sum is σ = 88640160. Its totient is φ = 7395840.

The previous prime is 28163353. The next prime is 28163411. The reversal of 28163400 is 436182.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43479 + ... + 44121.

It is an arithmetic number, because the mean of its divisors is an integer number (923335).

Almost surely, 2^28163400 is an apocalyptic number.

28163400 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 28163400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44320080).

28163400 is an abundant number, since it is smaller than the sum of its proper divisors (60476760).

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

28163400 is a wasteful number, since it uses less digits than its factorization.

28163400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 28163400 is about 5306.9200107030. The cubic root of 28163400 is about 304.2484407227.

Adding to 28163400 its reverse (436182), we get a palindrome (28599582).

It can be divided in two parts, 2816 and 3400, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 28163400 in words is "twenty-eight million, one hundred sixty-three thousand, four hundred".