13820228 has 6 divisors (see below), whose sum is σ = 24185406. Its totient is φ = 6910112.

The previous prime is 13820189. The next prime is 13820237. The reversal of 13820228 is 82202831.

It can be written as a sum of positive squares in only one way, i.e., 12902464 + 917764 = 3592^2 + 958^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13820197 and 13820206.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1727525 + ... + 1727532.

It is an arithmetic number, because the mean of its divisors is an integer number (4030901).

Almost surely, 2^13820228 is an apocalyptic number.

It is an amenable number.

13820228 is a deficient number, since it is larger than the sum of its proper divisors (10365178).

13820228 is a wasteful number, since it uses less digits than its factorization.

13820228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455061 (or 3455059 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 13820228 is about 3717.5567245168. The cubic root of 13820228 is about 239.9781693106.

The spelling of 13820228 in words is "thirteen million, eight hundred twenty thousand, two hundred twenty-eight".