28890382 has 4 divisors (see below), whose sum is σ = 43335576. Its totient is φ = 14445190.

The previous prime is 28890373. The next prime is 28890403. The reversal of 28890382 is 28309882.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 7222594 + ... + 7222597.

It is an arithmetic number, because the mean of its divisors is an integer number (10833894).

Almost surely, 2^28890382 is an apocalyptic number.

28890382 is a deficient number, since it is larger than the sum of its proper divisors (14445194).

28890382 is a wasteful number, since it uses less digits than its factorization.

28890382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14445193.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 28890382 is about 5374.9773953013. The cubic root of 28890382 is about 306.8440889413.

The spelling of 28890382 in words is "twenty-eight million, eight hundred ninety thousand, three hundred eighty-two".