28367388 has 96 divisors (see below), whose sum is σ = 84940800. Its totient is φ = 8019648.

The previous prime is 28367369. The next prime is 28367389. The reversal of 28367388 is 88376382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28367389) 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, 118573 + ... + 118811.

It is an arithmetic number, because the mean of its divisors is an integer number (884800).

Almost surely, 2^28367388 is an apocalyptic number.

28367388 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 28367388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42470400).

28367388 is an abundant number, since it is smaller than the sum of its proper divisors (56573412).

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

28367388 is a wasteful number, since it uses less digits than its factorization.

28367388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 408 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 28367388 is about 5326.1043925180. The cubic root of 28367388 is about 304.9812332805.

The spelling of 28367388 in words is "twenty-eight million, three hundred sixty-seven thousand, three hundred eighty-eight".