1223953272 has 24 divisors (see below), whose sum is σ = 3314873640. Its totient is φ = 407984400.

The previous prime is 1223953271. The next prime is 1223953331. The reversal of 1223953272 is 2723593221.

It is a happy number.

1223953272 is a `hidden beast` number, since 1 + 22 + 39 + 532 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1223953272² = 2996123224079011968, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223953271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8499604 + ... + 8499747.

It is an arithmetic number, because the mean of its divisors is an integer number (138119735).

Almost surely, 2^1223953272 is an apocalyptic number.

1223953272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1223953272 is an abundant number, since it is smaller than the sum of its proper divisors (2090920368).

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

1223953272 is a wasteful number, since it uses less digits than its factorization.

1223953272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16999363 (or 16999356 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 1223953272 is about 34985.0435472074. The cubic root of 1223953272 is about 1069.6826356655.

The spelling of 1223953272 in words is "one billion, two hundred twenty-three million, nine hundred fifty-three thousand, two hundred seventy-two".