1211859228 has 24 divisors (see below), whose sum is σ = 2829769488. Its totient is φ = 403653376.

The previous prime is 1211859227. The next prime is 1211859247. The reversal of 1211859228 is 8229581121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211859227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20301 + ... + 53252.

It is an arithmetic number, because the mean of its divisors is an integer number (117907062).

Almost surely, 2^1211859228 is an apocalyptic number.

It is an amenable number.

1211859228 is an abundant number, since it is smaller than the sum of its proper divisors (1617910260).

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

1211859228 is a wasteful number, since it uses less digits than its factorization.

1211859228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74933 (or 74931 counting only the distinct ones).

The product of its digits is 23040, while the sum is 39.

The square root of 1211859228 is about 34811.7685273242. The cubic root of 1211859228 is about 1066.1477419024.

The spelling of 1211859228 in words is "one billion, two hundred eleven million, eight hundred fifty-nine thousand, two hundred twenty-eight".