28316904 has 144 divisors (see below), whose sum is σ = 90972000. Its totient is φ = 7318080.

The previous prime is 28316903. The next prime is 28316909. The reversal of 28316904 is 40961382.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (28316903) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 142197 + ... + 142395.

It is an arithmetic number, because the mean of its divisors is an integer number (631750).

Almost surely, 2^28316904 is an apocalyptic number.

28316904 is a gapful number since it is divisible by the number (24) 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 28316904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45486000).

28316904 is an abundant number, since it is smaller than the sum of its proper divisors (62655096).

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

28316904 is a wasteful number, since it uses less digits than its factorization.

28316904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 28316904 is about 5321.3629832967. The cubic root of 28316904 is about 304.8002059781.

The spelling of 28316904 in words is "twenty-eight million, three hundred sixteen thousand, nine hundred four".