1216060140 has 96 divisors (see below), whose sum is σ = 3628800000. Its totient is φ = 303567616.

The previous prime is 1216060121. The next prime is 1216060159. The reversal of 1216060140 is 410606121.

It is an interprime number because it is at equal distance from previous prime (1216060121) and next prime (1216060159).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55486 + ... + 74234.

It is an arithmetic number, because the mean of its divisors is an integer number (37800000).

Almost surely, 2^1216060140 is an apocalyptic number.

1216060140 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 1216060140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814400000).

1216060140 is an abundant number, since it is smaller than the sum of its proper divisors (2412739860).

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

1216060140 is a wasteful number, since it uses less digits than its factorization.

1216060140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18831 (or 18829 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1216060140 is about 34872.0538540534. The cubic root of 1216060140 is about 1067.3782554350.

Adding to 1216060140 its reverse (410606121), we get a palindrome (1626666261).

The spelling of 1216060140 in words is "one billion, two hundred sixteen million, sixty thousand, one hundred forty".