28012206 has 16 divisors (see below), whose sum is σ = 58460544. Its totient is φ = 8931384.

The previous prime is 28012181. The next prime is 28012211. The reversal of 28012206 is 60221082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101356 + ... + 101631.

It is an arithmetic number, because the mean of its divisors is an integer number (3653784).

Almost surely, 2^28012206 is an apocalyptic number.

28012206 is an abundant number, since it is smaller than the sum of its proper divisors (30448338).

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

28012206 is a wasteful number, since it uses less digits than its factorization.

28012206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203015.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 28012206 is about 5292.6558550505. The cubic root of 28012206 is about 303.7030153072.

Adding to 28012206 its reverse (60221082), we get a palindrome (88233288).

The spelling of 28012206 in words is "twenty-eight million, twelve thousand, two hundred six".