1191226630 has 16 divisors (see below), whose sum is σ = 2339136144. Its totient is φ = 433173280.

The previous prime is 1191226573. The next prime is 1191226633. The reversal of 1191226630 is 366221911.

It is a junction number, because it is equal to n+sod(n) for n = 1191226592 and 1191226601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191226633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5414557 + ... + 5414776.

It is an arithmetic number, because the mean of its divisors is an integer number (146196009).

Almost surely, 2^1191226630 is an apocalyptic number.

1191226630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1191226630 is a deficient number, since it is larger than the sum of its proper divisors (1147909514).

1191226630 is a wasteful number, since it uses less digits than its factorization.

1191226630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10829351.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1191226630 is about 34514.1511557216. The cubic root of 1191226630 is about 1060.0624829668.

The spelling of 1191226630 in words is "one billion, one hundred ninety-one million, two hundred twenty-six thousand, six hundred thirty".