1216804492 has 24 divisors (see below), whose sum is σ = 2143013040. Its totient is φ = 604528320.

The previous prime is 1216804483. The next prime is 1216804493. The reversal of 1216804492 is 2944086121.

It is a super-3 number, since 3×1216804492³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1216804493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462942 + ... + 465562.

It is an arithmetic number, because the mean of its divisors is an integer number (89292210).

Almost surely, 2^1216804492 is an apocalyptic number.

It is an amenable number.

1216804492 is a deficient number, since it is larger than the sum of its proper divisors (926208548).

1216804492 is a wasteful number, since it uses less digits than its factorization.

1216804492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321 (or 3319 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 1216804492 is about 34882.7248362280. The cubic root of 1216804492 is about 1067.5959922235.

The spelling of 1216804492 in words is "one billion, two hundred sixteen million, eight hundred four thousand, four hundred ninety-two".