1226202047928 has 640 divisors, whose sum is σ = 4144082342400. Its totient is φ = 333777024000.

The previous prime is 1226202047923. The next prime is 1226202047933. The reversal of 1226202047928 is 8297402026221.

1226202047928 is a `hidden beast` number, since 12 + 2 + 620 + 2 + 0 + 4 + 7 + 9 + 2 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1226202047923) and next prime (1226202047933).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226202047923) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1749217978 + ... + 1749218678.

It is an arithmetic number, because the mean of its divisors is an integer number (6475128660).

Almost surely, 2^{1226202047928} is an apocalyptic number.

1226202047928 is a gapful number since it is divisible by the number (18) 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 1226202047928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2072041171200).

1226202047928 is an abundant number, since it is smaller than the sum of its proper divisors (2917880294472).

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

1226202047928 is a wasteful number, since it uses less digits than its factorization.

1226202047928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 1226202047928 in words is "one trillion, two hundred twenty-six billion, two hundred two million, forty-seven thousand, nine hundred twenty-eight".