1211873828 has 12 divisors (see below), whose sum is σ = 2313577392. Its totient is φ = 550851720.

The previous prime is 1211873813. The next prime is 1211873893. The reversal of 1211873828 is 8283781121.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13771250 + ... + 13771337.

It is an arithmetic number, because the mean of its divisors is an integer number (192798116).

Almost surely, 2^1211873828 is an apocalyptic number.

It is an amenable number.

1211873828 is a deficient number, since it is larger than the sum of its proper divisors (1101703564).

1211873828 is a wasteful number, since it uses less digits than its factorization.

1211873828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27542602 (or 27542600 counting only the distinct ones).

The product of its digits is 43008, while the sum is 41.

The square root of 1211873828 is about 34811.9782258923. The cubic root of 1211873828 is about 1066.1520233938.

The spelling of 1211873828 in words is "one billion, two hundred eleven million, eight hundred seventy-three thousand, eight hundred twenty-eight".