1220711040 has 256 divisors, whose sum is σ = 4431369600. Its totient is φ = 317399040.

The previous prime is 1220710979. The next prime is 1220711053. The reversal of 1220711040 is 401170221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 707619 + ... + 709341.

Almost surely, 2^1220711040 is an apocalyptic number.

1220711040 is a gapful number since it is divisible by the number (10) 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 1220711040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2215684800).

1220711040 is an abundant number, since it is smaller than the sum of its proper divisors (3210658560).

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

1220711040 is a wasteful number, since it uses less digits than its factorization.

1220711040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 1220711040 is about 34938.6754185101. The cubic root of 1220711040 is about 1068.7372765491.

Adding to 1220711040 its reverse (401170221), we get a palindrome (1621881261).

The spelling of 1220711040 in words is "one billion, two hundred twenty million, seven hundred eleven thousand, forty".