1226863812 has 48 divisors (see below), whose sum is σ = 2996711424. Its totient is φ = 390180000.

The previous prime is 1226863811. The next prime is 1226863817. The reversal of 1226863812 is 2183686221.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1226863811) 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 15 ways as a sum of consecutive naturals, for example, 3187 + ... + 49637.

It is an arithmetic number, because the mean of its divisors is an integer number (62431488).

Almost surely, 2^1226863812 is an apocalyptic number.

1226863812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1226863812 is an abundant number, since it is smaller than the sum of its proper divisors (1769847612).

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

1226863812 is a wasteful number, since it uses less digits than its factorization.

1226863812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46560 (or 46558 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 1226863812 is about 35026.6157657288. The cubic root of 1226863812 is about 1070.5298601444.

The spelling of 1226863812 in words is "one billion, two hundred twenty-six million, eight hundred sixty-three thousand, eight hundred twelve".