216928894 has 64 divisors (see below), whose sum is σ = 418328064. Its totient is φ = 82083456.

The previous prime is 216928843. The next prime is 216928897. The reversal of 216928894 is 498829612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216928897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 414517 + ... + 415039.

It is an arithmetic number, because the mean of its divisors is an integer number (6536376).

Almost surely, 2^216928894 is an apocalyptic number.

216928894 is a deficient number, since it is larger than the sum of its proper divisors (201399170).

216928894 is a wasteful number, since it uses less digits than its factorization.

216928894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641.

The product of its digits is 497664, while the sum is 49.

The square root of 216928894 is about 14728.5061700092. The cubic root of 216928894 is about 600.8588570580.

The spelling of 216928894 in words is "two hundred sixteen million, nine hundred twenty-eight thousand, eight hundred ninety-four".