216893430 has 128 divisors (see below), whose sum is σ = 633709440. Its totient is φ = 52462080.

The previous prime is 216893399. The next prime is 216893513. The reversal of 216893430 is 34398612.

216893430 is a `hidden beast` number, since 216 + 8 + 9 + 3 + 430 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 213604 + ... + 214616.

It is an arithmetic number, because the mean of its divisors is an integer number (4950855).

Almost surely, 2^216893430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216893430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316854720).

216893430 is an abundant number, since it is smaller than the sum of its proper divisors (416816010).

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

216893430 is a wasteful number, since it uses less digits than its factorization.

216893430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 216893430 is about 14727.3021969402. The cubic root of 216893430 is about 600.8261120428.

The spelling of 216893430 in words is "two hundred sixteen million, eight hundred ninety-three thousand, four hundred thirty".