1218402908 has 12 divisors (see below), whose sum is σ = 2132737320. Its totient is φ = 609049392.

The previous prime is 1218402907. The next prime is 1218402919. The reversal of 1218402908 is 8092048121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218402907) 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, 18923 + ... + 52866.

It is an arithmetic number, because the mean of its divisors is an integer number (177728110).

Almost surely, 2^1218402908 is an apocalyptic number.

It is an amenable number.

1218402908 is a deficient number, since it is larger than the sum of its proper divisors (914334412).

1218402908 is a wasteful number, since it uses less digits than its factorization.

1218402908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76036 (or 76034 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 1218402908 is about 34905.6286005567. The cubic root of 1218402908 is about 1068.0632587012.

The spelling of 1218402908 in words is "one billion, two hundred eighteen million, four hundred two thousand, nine hundred eight".