1218670872 has 16 divisors (see below), whose sum is σ = 3046677240. Its totient is φ = 406223616.

The previous prime is 1218670841. The next prime is 1218670877. The reversal of 1218670872 is 2780768121.

It is a super-4 number, since 4×1218670872⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218670877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25388953 + ... + 25389000.

Almost surely, 2^1218670872 is an apocalyptic number.

1218670872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1218670872 is an abundant number, since it is smaller than the sum of its proper divisors (1828006368).

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

1218670872 is a wasteful number, since it uses less digits than its factorization.

1218670872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50777962 (or 50777958 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 1218670872 is about 34909.4667962718. The cubic root of 1218670872 is about 1068.1415528687.

The spelling of 1218670872 in words is "one billion, two hundred eighteen million, six hundred seventy thousand, eight hundred seventy-two".