28192212 has 30 divisors (see below), whose sum is σ = 73700858. Its totient is φ = 9397296.

The previous prime is 28192211. The next prime is 28192217. The reversal of 28192212 is 21229182.

It can be written as a sum of positive squares in only one way, i.e., 21566736 + 6625476 = 4644^2 + 2574^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28192211) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 43183 + ... + 43830.

Almost surely, 2^28192212 is an apocalyptic number.

It is an amenable number.

28192212 is an abundant number, since it is smaller than the sum of its proper divisors (45508646).

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

28192212 is a wasteful number, since it uses less digits than its factorization.

28192212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87029 (or 87018 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 28192212 is about 5309.6338856836. The cubic root of 28192212 is about 304.3521571120.

The spelling of 28192212 in words is "twenty-eight million, one hundred ninety-two thousand, two hundred twelve".