1355821228 has 48 divisors (see below), whose sum is σ = 2530528000. Its totient is φ = 633821760.

The previous prime is 1355821219. The next prime is 1355821237. The reversal of 1355821228 is 8221285531.

It is an interprime number because it is at equal distance from previous prime (1355821219) and next prime (1355821237).

It is a super-3 number, since 3×1355821228³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2374183 + ... + 2374753.

Almost surely, 2^1355821228 is an apocalyptic number.

It is an amenable number.

1355821228 is a deficient number, since it is larger than the sum of its proper divisors (1174706772).

1355821228 is a wasteful number, since it uses less digits than its factorization.

1355821228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950 (or 948 counting only the distinct ones).

The product of its digits is 38400, while the sum is 37.

The square root of 1355821228 is about 36821.4778084748. The cubic root of 1355821228 is about 1106.7957337653.

The spelling of 1355821228 in words is "one billion, three hundred fifty-five million, eight hundred twenty-one thousand, two hundred twenty-eight".