216026646 has 32 divisors (see below), whose sum is σ = 484075008. Its totient is φ = 63692640.

The previous prime is 216026641. The next prime is 216026677. The reversal of 216026646 is 646620612.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216026641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41790 + ... + 46673.

It is an arithmetic number, because the mean of its divisors is an integer number (15127344).

Almost surely, 2^216026646 is an apocalyptic number.

216026646 is an abundant number, since it is smaller than the sum of its proper divisors (268048362).

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

216026646 is a wasteful number, since it uses less digits than its factorization.

216026646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88516.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 216026646 is about 14697.8449440726. The cubic root of 216026646 is about 600.0246712078.

The spelling of 216026646 in words is "two hundred sixteen million, twenty-six thousand, six hundred forty-six".