28904850 has 168 divisors, whose sum is σ = 88231332. Its totient is φ = 6998400.

The previous prime is 28904849. The next prime is 28904891. The reversal of 28904850 is 5840982.

It can be written as a sum of positive squares in 6 ways, for example, as 613089 + 28291761 = 783^2 + 5319^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 473820 + ... + 473880.

Almost surely, 2^28904850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28904850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44115666).

28904850 is an abundant number, since it is smaller than the sum of its proper divisors (59326482).

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

28904850 is a wasteful number, since it uses less digits than its factorization.

28904850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 84 counting only the distinct ones).

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

The square root of 28904850 is about 5376.3230929698. The cubic root of 28904850 is about 306.8953018261.

The spelling of 28904850 in words is "twenty-eight million, nine hundred four thousand, eight hundred fifty".