1218953430 has 24 divisors (see below), whose sum is σ = 3169279152. Its totient is φ = 325054224.

The previous prime is 1218953399. The next prime is 1218953447. The reversal of 1218953430 is 343598121.

1218953430 is a `hidden beast` number, since 1 + 218 + 9 + 5 + 3 + 430 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6771874 + ... + 6772053.

It is an arithmetic number, because the mean of its divisors is an integer number (132053298).

Almost surely, 2^1218953430 is an apocalyptic number.

1218953430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1218953430 is an abundant number, since it is smaller than the sum of its proper divisors (1950325722).

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

1218953430 is a wasteful number, since it uses less digits than its factorization.

1218953430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13543940 (or 13543937 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1218953430 is about 34913.5135728274. The cubic root of 1218953430 is about 1068.2240987048.

The spelling of 1218953430 in words is "one billion, two hundred eighteen million, nine hundred fifty-three thousand, four hundred thirty".