28196990 has 16 divisors (see below), whose sum is σ = 52505280. Its totient is φ = 10889760.

The previous prime is 28196989. The next prime is 28197031. The reversal of 28196990 is 9969182.

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 in 7 ways as a sum of consecutive naturals, for example, 48326 + ... + 48905.

It is an arithmetic number, because the mean of its divisors is an integer number (3281580).

Almost surely, 2^28196990 is an apocalyptic number.

28196990 is a deficient number, since it is larger than the sum of its proper divisors (24308290).

28196990 is a wasteful number, since it uses less digits than its factorization.

28196990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97267.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 28196990 is about 5310.0838034818. The cubic root of 28196990 is about 304.3693499507.

The spelling of 28196990 in words is "twenty-eight million, one hundred ninety-six thousand, nine hundred ninety".