1226640536 has 16 divisors (see below), whose sum is σ = 2509037640. Its totient is φ = 557563840.

The previous prime is 1226640509. The next prime is 1226640599. The reversal of 1226640536 is 6350466221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1226640496 and 1226640505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6969461 + ... + 6969636.

Almost surely, 2^1226640536 is an apocalyptic number.

It is an amenable number.

1226640536 is an abundant number, since it is smaller than the sum of its proper divisors (1282397104).

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

1226640536 is a wasteful number, since it uses less digits than its factorization.

1226640536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13939114 (or 13939110 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 1226640536 is about 35023.4283872953. The cubic root of 1226640536 is about 1070.4649145696.

The spelling of 1226640536 in words is "one billion, two hundred twenty-six million, six hundred forty thousand, five hundred thirty-six".