1220426688 has 224 divisors, whose sum is σ = 3627461376. Its totient is φ = 359718912.

The previous prime is 1220426687. The next prime is 1220426689. The reversal of 1220426688 is 8866240221.

It is an interprime number because it is at equal distance from previous prime (1220426687) and next prime (1220426689).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220426687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8908156 + ... + 8908292.

It is an arithmetic number, because the mean of its divisors is an integer number (16194024).

Almost surely, 2^1220426688 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 1220426688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1813730688).

1220426688 is an abundant number, since it is smaller than the sum of its proper divisors (2407034688).

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

1220426688 is a wasteful number, since it uses less digits than its factorization.

1220426688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 1220426688 is about 34934.6058801298. The cubic root of 1220426688 is about 1068.6542863431.

The spelling of 1220426688 in words is "one billion, two hundred twenty million, four hundred twenty-six thousand, six hundred eighty-eight".