28992330 has 112 divisors (see below), whose sum is σ = 80978184. Its totient is φ = 7464960.

The previous prime is 28992329. The next prime is 28992367. The reversal of 28992330 is 3329982.

28992330 = T₁₇₆ + T₁₇₇ + ... + T₅₆₃.

28992330 = 2406² + 2407² + ... + 2410².

It can be written as a sum of positive squares in 4 ways, for example, as 14907321 + 14085009 = 3861^2 + 3753^2 .

It is an unprimeable number.

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 55 ways as a sum of consecutive naturals, for example, 298842 + ... + 298938.

Almost surely, 2^28992330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28992330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40489092).

28992330 is an abundant number, since it is smaller than the sum of its proper divisors (51985854).

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

28992330 is an equidigital number, since it uses as much as digits as its factorization.

28992330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 28992330 is about 5384.4526184191. The cubic root of 28992330 is about 307.2045943527.

The spelling of 28992330 in words is "twenty-eight million, nine hundred ninety-two thousand, three hundred thirty".