1220061340 has 12 divisors (see below), whose sum is σ = 2562128856. Its totient is φ = 488024528.

The previous prime is 1220061331. The next prime is 1220061343. The reversal of 1220061340 is 431600221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220061343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30501514 + ... + 30501553.

It is an arithmetic number, because the mean of its divisors is an integer number (213510738).

Almost surely, 2^1220061340 is an apocalyptic number.

1220061340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220061340 is an abundant number, since it is smaller than the sum of its proper divisors (1342067516).

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

1220061340 is a wasteful number, since it uses less digits than its factorization.

1220061340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61003076 (or 61003074 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1220061340 is about 34929.3764616547. The cubic root of 1220061340 is about 1068.5476379399.

Adding to 1220061340 its reverse (431600221), we get a palindrome (1651661561).

The spelling of 1220061340 in words is "one billion, two hundred twenty million, sixty-one thousand, three hundred forty".