1211413028 has 36 divisors (see below), whose sum is σ = 2480587200. Its totient is φ = 507081456.

The previous prime is 1211412953. The next prime is 1211413043. The reversal of 1211413028 is 8203141121.

It is a super-3 number, since 3×1211413028³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211412994 and 1211413012.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 40073 + ... + 63471.

It is an arithmetic number, because the mean of its divisors is an integer number (68905200).

Almost surely, 2^1211413028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211413028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1240293600).

1211413028 is an abundant number, since it is smaller than the sum of its proper divisors (1269174172).

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

1211413028 is a wasteful number, since it uses less digits than its factorization.

1211413028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23496 (or 23451 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1211413028 is about 34805.3591850451. The cubic root of 1211413028 is about 1066.0168758996.

Adding to 1211413028 its reverse (8203141121), we get a palindrome (9414554149).

The spelling of 1211413028 in words is "one billion, two hundred eleven million, four hundred thirteen thousand, twenty-eight".