216190340 has 24 divisors (see below), whose sum is σ = 473739840. Its totient is φ = 82716128.

The previous prime is 216190327. The next prime is 216190393. The reversal of 216190340 is 43091612.

It is an unprimeable number.

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, 234530 + ... + 235449.

It is an arithmetic number, because the mean of its divisors is an integer number (19739160).

Almost surely, 2^216190340 is an apocalyptic number.

216190340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216190340 is an abundant number, since it is smaller than the sum of its proper divisors (257549500).

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

216190340 is a wasteful number, since it uses less digits than its factorization.

216190340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470011 (or 470009 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 216190340 is about 14703.4125290696. The cubic root of 216190340 is about 600.1761889981.

The spelling of 216190340 in words is "two hundred sixteen million, one hundred ninety thousand, three hundred forty".