28378196 has 48 divisors (see below), whose sum is σ = 62361600. Its totient is φ = 10977120.

The previous prime is 28378193. The next prime is 28378199. The reversal of 28378196 is 69187382.

It is an interprime number because it is at equal distance from previous prime (28378193) and next prime (28378199).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28378193) 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, 61061 + ... + 61523.

It is an arithmetic number, because the mean of its divisors is an integer number (1299200).

Almost surely, 2^28378196 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 28378196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31180800).

28378196 is an abundant number, since it is smaller than the sum of its proper divisors (33983404).

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

28378196 is a wasteful number, since it uses less digits than its factorization.

28378196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 682 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 28378196 is about 5327.1189211430. The cubic root of 28378196 is about 305.0199610693.

The spelling of 28378196 in words is "twenty-eight million, three hundred seventy-eight thousand, one hundred ninety-six".