1218248940 has 96 divisors (see below), whose sum is σ = 3483406080. Its totient is φ = 318041856.

The previous prime is 1218248929. The next prime is 1218248957. The reversal of 1218248940 is 498428121.

It is a super-2 number, since 2×1218248940² = 2968260959622247200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 718734 + ... + 720426.

It is an arithmetic number, because the mean of its divisors is an integer number (36285480).

Almost surely, 2^1218248940 is an apocalyptic number.

1218248940 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 1218248940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1741703040).

1218248940 is an abundant number, since it is smaller than the sum of its proper divisors (2265157140).

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

1218248940 is a wasteful number, since it uses less digits than its factorization.

1218248940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951 (or 1949 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 1218248940 is about 34903.4230413007. The cubic root of 1218248940 is about 1068.0182668817.

The spelling of 1218248940 in words is "one billion, two hundred eighteen million, two hundred forty-eight thousand, nine hundred forty".