1218310450 has 48 divisors (see below), whose sum is σ = 2596083840. Its totient is φ = 416689920.

The previous prime is 1218310441. The next prime is 1218310459. The reversal of 1218310450 is 540138121.

It is an interprime number because it is at equal distance from previous prime (1218310441) and next prime (1218310459).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1218310459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147531 + ... + 155569.

It is an arithmetic number, because the mean of its divisors is an integer number (54085080).

Almost surely, 2^1218310450 is an apocalyptic number.

1218310450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1218310450 is an abundant number, since it is smaller than the sum of its proper divisors (1377773390).

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

1218310450 is a wasteful number, since it uses less digits than its factorization.

1218310450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8491 (or 8486 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1218310450 is about 34904.3041758463. The cubic root of 1218310450 is about 1068.0362415051.

Adding to 1218310450 its reverse (540138121), we get a palindrome (1758448571).

The spelling of 1218310450 in words is "one billion, two hundred eighteen million, three hundred ten thousand, four hundred fifty".