1226612736 has 168 divisors, whose sum is σ = 3598493184. Its totient is φ = 402554880.

The previous prime is 1226612719. The next prime is 1226612759. The reversal of 1226612736 is 6372166221.

1226612736 is a `hidden beast` number, since 1 + 2 + 2 + 6 + 612 + 7 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1226612736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9363391 + ... + 9363521.

Almost surely, 2^1226612736 is an apocalyptic number.

1226612736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1226612736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1799246592).

1226612736 is an abundant number, since it is smaller than the sum of its proper divisors (2371880448).

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

1226612736 is a wasteful number, since it uses less digits than its factorization.

1226612736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 263 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 1226612736 is about 35023.0315078521. The cubic root of 1226612736 is about 1070.4568276720.

Adding to 1226612736 its reverse (6372166221), we get a palindrome (7598778957).

The spelling of 1226612736 in words is "one billion, two hundred twenty-six million, six hundred twelve thousand, seven hundred thirty-six".