216293944 has 32 divisors (see below), whose sum is σ = 420618240. Its totient is φ = 104162400.

The previous prime is 216293911. The next prime is 216293989. The reversal of 216293944 is 449392612.

It is a super-2 number, since 2×216293944² = 93566140422150272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216293897 and 216293906.

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, 53349 + ... + 57259.

It is an arithmetic number, because the mean of its divisors is an integer number (13144320).

Almost surely, 2^216293944 is an apocalyptic number.

It is an amenable number.

216293944 is a deficient number, since it is larger than the sum of its proper divisors (204324296).

216293944 is a wasteful number, since it uses less digits than its factorization.

216293944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4171 (or 4167 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 216293944 is about 14706.9352347795. The cubic root of 216293944 is about 600.2720470024.

The spelling of 216293944 in words is "two hundred sixteen million, two hundred ninety-three thousand, nine hundred forty-four".