1218152408 has 64 divisors (see below), whose sum is σ = 2650060800. Its totient is φ = 518801920.

The previous prime is 1218152407. The next prime is 1218152417. The reversal of 1218152408 is 8042518121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218152407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355841 + ... + 359247.

It is an arithmetic number, because the mean of its divisors is an integer number (41407200).

Almost surely, 2^1218152408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218152408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325030400).

1218152408 is an abundant number, since it is smaller than the sum of its proper divisors (1431908392).

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

1218152408 is a wasteful number, since it uses less digits than its factorization.

1218152408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680 (or 3676 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 1218152408 is about 34902.0401695947. The cubic root of 1218152408 is about 1067.9900568120.

The spelling of 1218152408 in words is "one billion, two hundred eighteen million, one hundred fifty-two thousand, four hundred eight".