216016394 has 16 divisors (see below), whose sum is σ = 356066496. Its totient is φ = 97471200.

The previous prime is 216016369. The next prime is 216016421. The reversal of 216016394 is 493610612.

It is a self number, because there is not a number n which added to its sum of digits gives 216016394.

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, 32822 + ... + 38849.

It is an arithmetic number, because the mean of its divisors is an integer number (22254156).

Almost surely, 2^216016394 is an apocalyptic number.

216016394 is a deficient number, since it is larger than the sum of its proper divisors (140050102).

216016394 is a wasteful number, since it uses less digits than its factorization.

216016394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71821.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 216016394 is about 14697.4961813229. The cubic root of 216016394 is about 600.0151792456.

The spelling of 216016394 in words is "two hundred sixteen million, sixteen thousand, three hundred ninety-four".