28404108 has 60 divisors (see below), whose sum is σ = 76839840. Its totient is φ = 9138528.

The previous prime is 28404071. The next prime is 28404109. The reversal of 28404108 is 80140482.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28404109) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7885 + ... + 10907.

It is an arithmetic number, because the mean of its divisors is an integer number (1280664).

Almost surely, 2^28404108 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 28404108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38419920).

28404108 is an abundant number, since it is smaller than the sum of its proper divisors (48435732).

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

28404108 is a wasteful number, since it uses less digits than its factorization.

28404108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068 (or 3057 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 28404108 is about 5329.5504500849. The cubic root of 28404108 is about 305.1127702675.

The spelling of 28404108 in words is "twenty-eight million, four hundred four thousand, one hundred eight".