1227791232 has 48 divisors (see below), whose sum is σ = 3533100480. Its totient is φ = 409263360.

The previous prime is 1227791179. The next prime is 1227791261. The reversal of 1227791232 is 2321977221.

It is a tau number, because it is divible by the number of its divisors (48).

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 531744 + ... + 534047.

It is an arithmetic number, because the mean of its divisors is an integer number (73606260).

Almost surely, 2^1227791232 is an apocalyptic number.

1227791232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1227791232 is an abundant number, since it is smaller than the sum of its proper divisors (2305309248).

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

1227791232 is a wasteful number, since it uses less digits than its factorization.

1227791232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065811 (or 1065796 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 1227791232 is about 35039.8520544822. The cubic root of 1227791232 is about 1070.7995398293.

The spelling of 1227791232 in words is "one billion, two hundred twenty-seven million, seven hundred ninety-one thousand, two hundred thirty-two".