1218386742 has 16 divisors (see below), whose sum is σ = 2565024960. Its totient is φ = 384753672.

The previous prime is 1218386693. The next prime is 1218386783. The reversal of 1218386742 is 2476838121.

1218386742 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1218386694 and 1218386703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5343688 + ... + 5343915.

It is an arithmetic number, because the mean of its divisors is an integer number (160314060).

Almost surely, 2^1218386742 is an apocalyptic number.

1218386742 is an abundant number, since it is smaller than the sum of its proper divisors (1346638218).

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

1218386742 is a wasteful number, since it uses less digits than its factorization.

1218386742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10687627.

The product of its digits is 129024, while the sum is 42.

The square root of 1218386742 is about 34905.3970325507. The cubic root of 1218386742 is about 1068.0585349253.

The spelling of 1218386742 in words is "one billion, two hundred eighteen million, three hundred eighty-six thousand, seven hundred forty-two".