28016990 has 32 divisors (see below), whose sum is σ = 52992576. Its totient is φ = 10644480.

The previous prime is 28016983. The next prime is 28016999. The reversal of 28016990 is 9961082.

It is a self number, because there is not a number n which added to its sum of digits gives 28016990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28016999) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 41294 + ... + 41966.

It is an arithmetic number, because the mean of its divisors is an integer number (1656018).

Almost surely, 2^28016990 is an apocalyptic number.

28016990 is a deficient number, since it is larger than the sum of its proper divisors (24975586).

28016990 is a wasteful number, since it uses less digits than its factorization.

28016990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 28016990 is about 5293.1077827681. The cubic root of 28016990 is about 303.7203033960.

The spelling of 28016990 in words is "twenty-eight million, sixteen thousand, nine hundred ninety".