216041904 has 100 divisors (see below), whose sum is σ = 673439536. Its totient is φ = 66469248.

The previous prime is 216041897. The next prime is 216041923. The reversal of 216041904 is 409140612.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10437 + ... + 23259.

Almost surely, 2^216041904 is an apocalyptic number.

216041904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216041904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336719768).

216041904 is an abundant number, since it is smaller than the sum of its proper divisors (457397632).

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

216041904 is a wasteful number, since it uses less digits than its factorization.

216041904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12856 (or 12841 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 216041904 is about 14698.3639905943. The cubic root of 216041904 is about 600.0387974912.

The spelling of 216041904 in words is "two hundred sixteen million, forty-one thousand, nine hundred four".