28907892 has 72 divisors (see below), whose sum is σ = 82860960. Its totient is φ = 8424000.

The previous prime is 28907891. The next prime is 28907897. The reversal of 28907892 is 29870982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28907891) 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 23 ways as a sum of consecutive naturals, for example, 7267 + ... + 10517.

Almost surely, 2^28907892 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 28907892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41430480).

28907892 is an abundant number, since it is smaller than the sum of its proper divisors (53953068).

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

28907892 is a wasteful number, since it uses less digits than its factorization.

28907892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3293 (or 3288 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 28907892 is about 5376.6059926314. The cubic root of 28907892 is about 306.9060675252.

The spelling of 28907892 in words is "twenty-eight million, nine hundred seven thousand, eight hundred ninety-two".