1218496406 has 4 divisors (see below), whose sum is σ = 1827744612. Its totient is φ = 609248202.

The previous prime is 1218496397. The next prime is 1218496439. The reversal of 1218496406 is 6046948121.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304624100 + ... + 304624103.

It is an arithmetic number, because the mean of its divisors is an integer number (456936153).

Almost surely, 2^1218496406 is an apocalyptic number.

1218496406 is a deficient number, since it is larger than the sum of its proper divisors (609248206).

1218496406 is an equidigital number, since it uses as much as digits as its factorization.

1218496406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609248205.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 1218496406 is about 34906.9678717588. The cubic root of 1218496406 is about 1068.0905784063.

The spelling of 1218496406 in words is "one billion, two hundred eighteen million, four hundred ninety-six thousand, four hundred six".