1216444498 has 16 divisors (see below), whose sum is σ = 1933628760. Its totient is φ = 572924800.

The previous prime is 1216444417. The next prime is 1216444507. The reversal of 1216444498 is 8944446121.

It can be written as a sum of positive squares in 4 ways, for example, as 328225689 + 888218809 = 18117^2 + 29803^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253393 + ... + 258148.

Almost surely, 2^1216444498 is an apocalyptic number.

1216444498 is a deficient number, since it is larger than the sum of its proper divisors (717184262).

1216444498 is a wasteful number, since it uses less digits than its factorization.

1216444498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511613.

The product of its digits is 221184, while the sum is 43.

The square root of 1216444498 is about 34877.5643931740. The cubic root of 1216444498 is about 1067.4906983816.

The spelling of 1216444498 in words is "one billion, two hundred sixteen million, four hundred forty-four thousand, four hundred ninety-eight".