1227136672 has 48 divisors (see below), whose sum is σ = 2488993920. Its totient is φ = 595116288.

The previous prime is 1227136661. The next prime is 1227136681. The reversal of 1227136672 is 2766317221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423613 + ... + 426499.

It is an arithmetic number, because the mean of its divisors is an integer number (51854040).

Almost surely, 2^1227136672 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 1227136672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1244496960).

1227136672 is an abundant number, since it is smaller than the sum of its proper divisors (1261857248).

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

1227136672 is a wasteful number, since it uses less digits than its factorization.

1227136672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3293 (or 3285 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 1227136672 is about 35030.5105872010. The cubic root of 1227136672 is about 1070.6092178048.

The spelling of 1227136672 in words is "one billion, two hundred twenty-seven million, one hundred thirty-six thousand, six hundred seventy-two".