1220786070 has 128 divisors (see below), whose sum is σ = 3480164352. Its totient is φ = 268262400.

The previous prime is 1220786069. The next prime is 1220786089. The reversal of 1220786070 is 706870221.

1220786070 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

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, 610312 + ... + 612308.

It is an arithmetic number, because the mean of its divisors is an integer number (27188784).

Almost surely, 2^1220786070 is an apocalyptic number.

1220786070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220786070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1740082176).

1220786070 is an abundant number, since it is smaller than the sum of its proper divisors (2259378282).

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

1220786070 is a wasteful number, since it uses less digits than its factorization.

1220786070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 1220786070 is about 34939.7491404847. The cubic root of 1220786070 is about 1068.7591724530.

The spelling of 1220786070 in words is "one billion, two hundred twenty million, seven hundred eighty-six thousand, seventy".