28092212 has 6 divisors (see below), whose sum is σ = 49161378. Its totient is φ = 14046104.

The previous prime is 28092199. The next prime is 28092221. The reversal of 28092212 is 21229082.

It can be written as a sum of positive squares in only one way, i.e., 27836176 + 256036 = 5276^2 + 506^2 .

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, 3511523 + ... + 3511530.

It is an arithmetic number, because the mean of its divisors is an integer number (8193563).

Almost surely, 2^28092212 is an apocalyptic number.

It is an amenable number.

28092212 is a deficient number, since it is larger than the sum of its proper divisors (21069166).

28092212 is a wasteful number, since it uses less digits than its factorization.

28092212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7023057 (or 7023055 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 28092212 is about 5300.2086751372. The cubic root of 28092212 is about 303.9918770914.

The spelling of 28092212 in words is "twenty-eight million, ninety-two thousand, two hundred twelve".