1211823696 has 80 divisors (see below), whose sum is σ = 3248452800. Its totient is φ = 388813824.

The previous prime is 1211823673. The next prime is 1211823719. The reversal of 1211823696 is 6963281121.

It is an interprime number because it is at equal distance from previous prime (1211823673) and next prime (1211823719).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526420 + ... + 528716.

It is an arithmetic number, because the mean of its divisors is an integer number (40605660).

Almost surely, 2^1211823696 is an apocalyptic number.

1211823696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211823696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1624226400).

1211823696 is an abundant number, since it is smaller than the sum of its proper divisors (2036629104).

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

1211823696 is a wasteful number, since it uses less digits than its factorization.

1211823696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716 (or 2710 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 1211823696 is about 34811.2581789283. The cubic root of 1211823696 is about 1066.1373218991.

The spelling of 1211823696 in words is "one billion, two hundred eleven million, eight hundred twenty-three thousand, six hundred ninety-six".