1218655452 has 24 divisors (see below), whose sum is σ = 3249748096. Its totient is φ = 348187248.

The previous prime is 1218655439. The next prime is 1218655453. The reversal of 1218655452 is 2545568121.

It is a super-2 number, since 2×1218655452² = 2970242221378648608, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1218655452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218655453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7253818 + ... + 7253985.

Almost surely, 2^1218655452 is an apocalyptic number.

1218655452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1218655452 is an abundant number, since it is smaller than the sum of its proper divisors (2031092644).

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

1218655452 is a wasteful number, since it uses less digits than its factorization.

1218655452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14507817 (or 14507815 counting only the distinct ones).

The product of its digits is 96000, while the sum is 39.

The square root of 1218655452 is about 34909.2459385762. The cubic root of 1218655452 is about 1068.1370477387.

The spelling of 1218655452 in words is "one billion, two hundred eighteen million, six hundred fifty-five thousand, four hundred fifty-two".