28330990 has 8 divisors (see below), whose sum is σ = 50995800. Its totient is φ = 11332392.

The previous prime is 28330987. The next prime is 28330997. The reversal of 28330990 is 9903382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28330997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1416540 + ... + 1416559.

It is an arithmetic number, because the mean of its divisors is an integer number (6374475).

Almost surely, 2^28330990 is an apocalyptic number.

28330990 is a deficient number, since it is larger than the sum of its proper divisors (22664810).

28330990 is a wasteful number, since it uses less digits than its factorization.

28330990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833106.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 28330990 is about 5322.6863518340. The cubic root of 28330990 is about 304.8507376792.

The spelling of 28330990 in words is "twenty-eight million, three hundred thirty thousand, nine hundred ninety".