3728222 has 4 divisors (see below), whose sum is σ = 5592336. Its totient is φ = 1864110.

The previous prime is 3728203. The next prime is 3728243. The reversal of 3728222 is 2228273.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2228273 = 29 ⋅76837.

It is a junction number, because it is equal to n+sod(n) for n = 3728191 and 3728200.

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, 932054 + ... + 932057.

It is an arithmetic number, because the mean of its divisors is an integer number (1398084).

Almost surely, 2^3728222 is an apocalyptic number.

3728222 is a deficient number, since it is larger than the sum of its proper divisors (1864114).

3728222 is a wasteful number, since it uses less digits than its factorization.

3728222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864113.

The product of its digits is 2688, while the sum is 26.

The square root of 3728222 is about 1930.8604299638. The cubic root of 3728222 is about 155.0602887219.

The spelling of 3728222 in words is "three million, seven hundred twenty-eight thousand, two hundred twenty-two".