216356438 has 8 divisors (see below), whose sum is σ = 327090432. Its totient is φ = 107326296.

The previous prime is 216356429. The next prime is 216356449. The reversal of 216356438 is 834653612.

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, 425645 + ... + 426152.

It is an arithmetic number, because the mean of its divisors is an integer number (40886304).

Almost surely, 2^216356438 is an apocalyptic number.

216356438 is a deficient number, since it is larger than the sum of its proper divisors (110733994).

216356438 is a wasteful number, since it uses less digits than its factorization.

216356438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851926.

The product of its digits is 103680, while the sum is 38.

The square root of 216356438 is about 14709.0597252170. The cubic root of 216356438 is about 600.3298538127.

The spelling of 216356438 in words is "two hundred sixteen million, three hundred fifty-six thousand, four hundred thirty-eight".