309228003656 has 256 divisors, whose sum is σ = 731230053120. Its totient is φ = 121438310400.

The previous prime is 309228003647. The next prime is 309228003697. The reversal of 309228003656 is 656300822903.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 778911650 + ... + 778912046.

It is an arithmetic number, because the mean of its divisors is an integer number (2856367395).

Almost surely, 2^309228003656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309228003656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365615026560).

309228003656 is an abundant number, since it is smaller than the sum of its proper divisors (422002049464).

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

309228003656 is a wasteful number, since it uses less digits than its factorization.

309228003656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 309228003656 in words is "three hundred nine billion, two hundred twenty-eight million, three thousand, six hundred fifty-six".