28897950 has 48 divisors (see below), whose sum is σ = 73209600. Its totient is φ = 7540320.

The previous prime is 28897937. The next prime is 28897991. The reversal of 28897950 is 5979882.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28897950.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5001 + ... + 9099.

It is an arithmetic number, because the mean of its divisors is an integer number (1525200).

Almost surely, 2^28897950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28897950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36604800).

28897950 is an abundant number, since it is smaller than the sum of its proper divisors (44311650).

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

28897950 is a wasteful number, since it uses less digits than its factorization.

28897950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4161 (or 4156 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 28897950 is about 5375.6813521636. The cubic root of 28897950 is about 306.8708797873.

The spelling of 28897950 in words is "twenty-eight million, eight hundred ninety-seven thousand, nine hundred fifty".