1218658152 has 32 divisors (see below), whose sum is σ = 3050172000. Its totient is φ = 405749184.

The previous prime is 1218658127. The next prime is 1218658153. The reversal of 1218658152 is 2518568121.

It is a self number, because there is not a number n which added to its sum of digits gives 1218658152.

It is not an unprimeable number, because it can be changed into a prime (1218658153) 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, 7902 + ... + 49997.

It is an arithmetic number, because the mean of its divisors is an integer number (95317875).

Almost surely, 2^1218658152 is an apocalyptic number.

1218658152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1218658152 is an abundant number, since it is smaller than the sum of its proper divisors (1831513848).

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

1218658152 is a wasteful number, since it uses less digits than its factorization.

1218658152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58785 (or 58781 counting only the distinct ones).

The product of its digits is 38400, while the sum is 39.

The square root of 1218658152 is about 34909.2846102581. The cubic root of 1218658152 is about 1068.1378365774.

The spelling of 1218658152 in words is "one billion, two hundred eighteen million, six hundred fifty-eight thousand, one hundred fifty-two".