1228262931 has 12 divisors (see below), whose sum is σ = 2027608752. Its totient is φ = 701864496.

The previous prime is 1228262927. The next prime is 1228262933. The reversal of 1228262931 is 1392628221.

It is a happy number.

1228262931 is a `hidden beast` number, since 1 + 2 + 28 + 2 + 629 + 3 + 1 = 666.

It is not a de Polignac number, because 1228262931 - 2² = 1228262927 is a prime.

It is a super-2 number, since 2×1228262931² = 3017259655337421522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1228262933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9748056 + ... + 9748181.

It is an arithmetic number, because the mean of its divisors is an integer number (168967396).

Almost surely, 2^1228262931 is an apocalyptic number.

1228262931 is a deficient number, since it is larger than the sum of its proper divisors (799345821).

1228262931 is a wasteful number, since it uses less digits than its factorization.

1228262931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19496250 (or 19496247 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1228262931 is about 35046.5823012744. The cubic root of 1228262931 is about 1070.9366506533.

The spelling of 1228262931 in words is "one billion, two hundred twenty-eight million, two hundred sixty-two thousand, nine hundred thirty-one".