216728034 has 16 divisors (see below), whose sum is σ = 452302272. Its totient is φ = 69101648.

The previous prime is 216728033. The next prime is 216728081. The reversal of 216728034 is 430827612.

It is a junction number, because it is equal to n+sod(n) for n = 216727986 and 216728004.

It is not an unprimeable number, because it can be changed into a prime (216728033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785109 + ... + 785384.

It is an arithmetic number, because the mean of its divisors is an integer number (28268892).

Almost surely, 2^216728034 is an apocalyptic number.

216728034 is an abundant number, since it is smaller than the sum of its proper divisors (235574238).

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

216728034 is a wasteful number, since it uses less digits than its factorization.

216728034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570521.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 216728034 is about 14721.6858409626. The cubic root of 216728034 is about 600.6733496067.

The spelling of 216728034 in words is "two hundred sixteen million, seven hundred twenty-eight thousand, thirty-four".