1218498120 has 512 divisors, whose sum is σ = 5184000000. Its totient is φ = 247836672.

The previous prime is 1218498107. The next prime is 1218498157. The reversal of 1218498120 is 218948121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2441631 + ... + 2442129.

It is an arithmetic number, because the mean of its divisors is an integer number (10125000).

Almost surely, 2^1218498120 is an apocalyptic number.

1218498120 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 1218498120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2592000000).

1218498120 is an abundant number, since it is smaller than the sum of its proper divisors (3965501880).

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

1218498120 is a wasteful number, since it uses less digits than its factorization.

1218498120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1218498120 is about 34906.9924227224. The cubic root of 1218498120 is about 1068.0910792165.

The spelling of 1218498120 in words is "one billion, two hundred eighteen million, four hundred ninety-eight thousand, one hundred twenty".