1216800790 has 32 divisors (see below), whose sum is σ = 2231206560. Its totient is φ = 477702144.

The previous prime is 1216800779. The next prime is 1216800803. The reversal of 1216800790 is 970086121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111414 + ... + 121846.

It is an arithmetic number, because the mean of its divisors is an integer number (69725205).

Almost surely, 2^1216800790 is an apocalyptic number.

1216800790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216800790 is a deficient number, since it is larger than the sum of its proper divisors (1014405770).

1216800790 is a wasteful number, since it uses less digits than its factorization.

1216800790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10656.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 1216800790 is about 34882.6717726725. The cubic root of 1216800790 is about 1067.5949095395.

The spelling of 1216800790 in words is "one billion, two hundred sixteen million, eight hundred thousand, seven hundred ninety".