1218855060 has 48 divisors (see below), whose sum is σ = 3791995200. Its totient is φ = 325027872.

The previous prime is 1218855059. The next prime is 1218855061. The reversal of 1218855060 is 605588121.

1218855060 is a `hidden beast` number, since 1 + 21 + 88 + 550 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1218855059) and next prime (1218855061).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218855061) 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, 1128030 + ... + 1129109.

It is an arithmetic number, because the mean of its divisors is an integer number (78999900).

Almost surely, 2^1218855060 is an apocalyptic number.

1218855060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1218855060 is an abundant number, since it is smaller than the sum of its proper divisors (2573140140).

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

1218855060 is a wasteful number, since it uses less digits than its factorization.

1218855060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257157 (or 2257149 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 1218855060 is about 34912.1047775696. The cubic root of 1218855060 is about 1068.1953625697.

The spelling of 1218855060 in words is "one billion, two hundred eighteen million, eight hundred fifty-five thousand, sixty".