216443794 has 8 divisors (see below), whose sum is σ = 371046528. Its totient is φ = 92761620.

The previous prime is 216443783. The next prime is 216443803. The reversal of 216443794 is 497344612.

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

It is a super-2 number, since 2×216443794² = 93695831922228872, which contains 22 as substring.

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, 7730122 + ... + 7730149.

It is an arithmetic number, because the mean of its divisors is an integer number (46380816).

Almost surely, 2^216443794 is an apocalyptic number.

216443794 is a deficient number, since it is larger than the sum of its proper divisors (154602734).

216443794 is a wasteful number, since it uses less digits than its factorization.

216443794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15460280.

The product of its digits is 145152, while the sum is 40.

The square root of 216443794 is about 14712.0288879542. The cubic root of 216443794 is about 600.4106392652.

The spelling of 216443794 in words is "two hundred sixteen million, four hundred forty-three thousand, seven hundred ninety-four".