216435390 has 16 divisors (see below), whose sum is σ = 519445008. Its totient is φ = 57716096.

The previous prime is 216435389. The next prime is 216435407. The reversal of 216435390 is 93534612.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3607227 + ... + 3607286.

It is an arithmetic number, because the mean of its divisors is an integer number (32465313).

Almost surely, 2^216435390 is an apocalyptic number.

216435390 is an abundant number, since it is smaller than the sum of its proper divisors (303009618).

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

216435390 is a wasteful number, since it uses less digits than its factorization.

216435390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7214523.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 216435390 is about 14711.7432685593. The cubic root of 216435390 is about 600.4028683235.

The spelling of 216435390 in words is "two hundred sixteen million, four hundred thirty-five thousand, three hundred ninety".