1213693272 has 96 divisors (see below), whose sum is σ = 3601849680. Its totient is φ = 366151680.

The previous prime is 1213693259. The next prime is 1213693301. The reversal of 1213693272 is 2723963121.

1213693272 is a `hidden beast` number, since 1 + 21 + 369 + 3 + 272 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181248 + ... + 187824.

Almost surely, 2^1213693272 is an apocalyptic number.

1213693272 is a gapful number since it is divisible by the number (12) 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 1213693272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1800924840).

1213693272 is an abundant number, since it is smaller than the sum of its proper divisors (2388156408).

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

1213693272 is a wasteful number, since it uses less digits than its factorization.

1213693272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6833 (or 6826 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 1213693272 is about 34838.1008667235. The cubic root of 1213693272 is about 1066.6853115665.

The spelling of 1213693272 in words is "one billion, two hundred thirteen million, six hundred ninety-three thousand, two hundred seventy-two".