216408044 has 12 divisors (see below), whose sum is σ = 378846384. Its totient is φ = 108166224.

The previous prime is 216408029. The next prime is 216408083. The reversal of 216408044 is 440804612.

It is a junction number, because it is equal to n+sod(n) for n = 216407998 and 216408016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6377 + ... + 21759.

It is an arithmetic number, because the mean of its divisors is an integer number (31570532).

Almost surely, 2^216408044 is an apocalyptic number.

It is an amenable number.

216408044 is a deficient number, since it is larger than the sum of its proper divisors (162438340).

216408044 is a wasteful number, since it uses less digits than its factorization.

216408044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18904 (or 18902 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 216408044 is about 14710.8138456035. The cubic root of 216408044 is about 600.3775808565.

The spelling of 216408044 in words is "two hundred sixteen million, four hundred eight thousand, forty-four".