1216939198 has 8 divisors (see below), whose sum is σ = 1825711200. Its totient is φ = 608368800.

The previous prime is 1216939183. The next prime is 1216939211. The reversal of 1216939198 is 8919396121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34278 + ... + 60073.

It is an arithmetic number, because the mean of its divisors is an integer number (228213900).

Almost surely, 2^1216939198 is an apocalyptic number.

1216939198 is a deficient number, since it is larger than the sum of its proper divisors (608772002).

1216939198 is an equidigital number, since it uses as much as digits as its factorization.

1216939198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100802.

The product of its digits is 209952, while the sum is 49.

The square root of 1216939198 is about 34884.6556239273. The cubic root of 1216939198 is about 1067.6353867414.

The spelling of 1216939198 in words is "one billion, two hundred sixteen million, nine hundred thirty-nine thousand, one hundred ninety-eight".