216242628 has 24 divisors (see below), whose sum is σ = 576647232. Its totient is φ = 61783584.

The previous prime is 216242603. The next prime is 216242633. The reversal of 216242628 is 826242612.

216242628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1287075 + ... + 1287242.

It is an arithmetic number, because the mean of its divisors is an integer number (24026968).

Almost surely, 2^216242628 is an apocalyptic number.

216242628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216242628 is an abundant number, since it is smaller than the sum of its proper divisors (360404604).

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

216242628 is a wasteful number, since it uses less digits than its factorization.

216242628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574331 (or 2574329 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 216242628 is about 14705.1905121967. The cubic root of 216242628 is about 600.2245714911.

The spelling of 216242628 in words is "two hundred sixteen million, two hundred forty-two thousand, six hundred twenty-eight".