216403850 has 36 divisors (see below), whose sum is σ = 434226114. Its totient is φ = 79764480.

The previous prime is 216403843. The next prime is 216403919. The reversal of 216403850 is 58304612.

216403850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 9 ways, for example, as 102191881 + 114211969 = 10109^2 + 10687^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 374762 + ... + 375338.

Almost surely, 2^216403850 is an apocalyptic number.

216403850 is an abundant number, since it is smaller than the sum of its proper divisors (217822264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216403850 is an equidigital number, since it uses as much as digits as its factorization.

216403850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 216403850 is about 14710.6712967152. The cubic root of 216403850 is about 600.3737023811.

The spelling of 216403850 in words is "two hundred sixteen million, four hundred three thousand, eight hundred fifty".