28850904 has 128 divisors (see below), whose sum is σ = 86788800. Its totient is φ = 8957952.

The previous prime is 28850897. The next prime is 28850909. The reversal of 28850904 is 40905882.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28850909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297384 + ... + 297480.

Almost surely, 2^28850904 is an apocalyptic number.

28850904 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 28850904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43394400).

28850904 is an abundant number, since it is smaller than the sum of its proper divisors (57937896).

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

28850904 is an equidigital number, since it uses as much as digits as its factorization.

28850904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28850904 is about 5371.3037523491. The cubic root of 28850904 is about 306.7042602516.

The spelling of 28850904 in words is "twenty-eight million, eight hundred fifty thousand, nine hundred four".