1226556036 has 36 divisors (see below), whose sum is σ = 3151293964. Its totient is φ = 402148800.

The previous prime is 1226556017. The next prime is 1226556043. The reversal of 1226556036 is 6306556221.

It is a happy number.

1226556036 is a `hidden beast` number, since 1 + 2 + 2 + 65 + 560 + 36 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 650556036 + 576000000 = 25506^2 + 24000^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

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, 277075 + ... + 281466.

Almost surely, 2^1226556036 is an apocalyptic number.

It is an amenable number.

1226556036 is an abundant number, since it is smaller than the sum of its proper divisors (1924737928).

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

1226556036 is a wasteful number, since it uses less digits than its factorization.

1226556036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558612 (or 558607 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1226556036 is about 35022.2220311619. Note that the first 3 decimals coincide. The cubic root of 1226556036 is about 1070.4403335127.

The spelling of 1226556036 in words is "one billion, two hundred twenty-six million, five hundred fifty-six thousand, thirty-six".