1226361138 has 32 divisors (see below), whose sum is σ = 2512339200. Its totient is φ = 398951376.

The previous prime is 1226361131. The next prime is 1226361139. The reversal of 1226361138 is 8311636221.

It is a junction number, because it is equal to n+sod(n) for n = 1226361099 and 1226361108.

It is not an unprimeable number, because it can be changed into a prime (1226361131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36745 + ... + 61667.

It is an arithmetic number, because the mean of its divisors is an integer number (78510600).

Almost surely, 2^1226361138 is an apocalyptic number.

1226361138 is an abundant number, since it is smaller than the sum of its proper divisors (1285978062).

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

1226361138 is a wasteful number, since it uses less digits than its factorization.

1226361138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25126.

The product of its digits is 10368, while the sum is 33.

The square root of 1226361138 is about 35019.4394301222. The cubic root of 1226361138 is about 1070.3836333634.

Adding to 1226361138 its reverse (8311636221), we get a palindrome (9537997359).

The spelling of 1226361138 in words is "one billion, two hundred twenty-six million, three hundred sixty-one thousand, one hundred thirty-eight".