216707340 has 24 divisors (see below), whose sum is σ = 606780720. Its totient is φ = 57788608.

The previous prime is 216707333. The next prime is 216707377. The reversal of 216707340 is 43707612.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 216707298 and 216707307.

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, 1805835 + ... + 1805954.

It is an arithmetic number, because the mean of its divisors is an integer number (25282530).

Almost surely, 2^216707340 is an apocalyptic number.

216707340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216707340 is an abundant number, since it is smaller than the sum of its proper divisors (390073380).

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

216707340 is a wasteful number, since it uses less digits than its factorization.

216707340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611801 (or 3611799 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 216707340 is about 14720.9829834831. The cubic root of 216707340 is about 600.6542308219.

The spelling of 216707340 in words is "two hundred sixteen million, seven hundred seven thousand, three hundred forty".