1226805888 has 128 divisors (see below), whose sum is σ = 4062896640. Its totient is φ = 318643200.

The previous prime is 1226805871. The next prime is 1226805907. The reversal of 1226805888 is 8885086221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8823 + ... + 50313.

It is an arithmetic number, because the mean of its divisors is an integer number (31741380).

Almost surely, 2^1226805888 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 1226805888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2031448320).

1226805888 is an abundant number, since it is smaller than the sum of its proper divisors (2836090752).

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

1226805888 is a wasteful number, since it uses less digits than its factorization.

1226805888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41526 (or 41514 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 48.

The square root of 1226805888 is about 35025.7888990384. The cubic root of 1226805888 is about 1070.5130122142.

The spelling of 1226805888 in words is "one billion, two hundred twenty-six million, eight hundred five thousand, eight hundred eighty-eight".