28334988 has 192 divisors, whose sum is σ = 89994240. Its totient is φ = 7603200.

The previous prime is 28334987. The next prime is 28334989. The reversal of 28334988 is 88943382.

It is an interprime number because it is at equal distance from previous prime (28334987) and next prime (28334989).

It is not an unprimeable number, because it can be changed into a prime (28334981) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 464478 + ... + 464538.

It is an arithmetic number, because the mean of its divisors is an integer number (468720).

Almost surely, 2^28334988 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 28334988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44997120).

28334988 is an abundant number, since it is smaller than the sum of its proper divisors (61659252).

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

28334988 is a wasteful number, since it uses less digits than its factorization.

28334988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 117 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 28334988 is about 5323.0619008236. The cubic root of 28334988 is about 304.8650769348.

The spelling of 28334988 in words is "twenty-eight million, three hundred thirty-four thousand, nine hundred eighty-eight".