216485628 has 12 divisors (see below), whose sum is σ = 505133160. Its totient is φ = 72161872.

The previous prime is 216485611. The next prime is 216485629. The reversal of 216485628 is 826584612.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 216485628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216485629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9020223 + ... + 9020246.

It is an arithmetic number, because the mean of its divisors is an integer number (42094430).

Almost surely, 2^216485628 is an apocalyptic number.

It is an amenable number.

216485628 is an abundant number, since it is smaller than the sum of its proper divisors (288647532).

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

216485628 is a wasteful number, since it uses less digits than its factorization.

216485628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18040476 (or 18040474 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 216485628 is about 14713.4505810160. The cubic root of 216485628 is about 600.4493189923.

The spelling of 216485628 in words is "two hundred sixteen million, four hundred eighty-five thousand, six hundred twenty-eight".