216457746 has 32 divisors (see below), whose sum is σ = 438671808. Its totient is φ = 71198400.

The previous prime is 216457741. The next prime is 216457751. The reversal of 216457746 is 647754612.

It is an interprime number because it is at equal distance from previous prime (216457741) and next prime (216457751).

It is a junction number, because it is equal to n+sod(n) for n = 216457698 and 216457707.

It is not an unprimeable number, because it can be changed into a prime (216457741) 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 15 ways as a sum of consecutive naturals, for example, 331156 + ... + 331808.

It is an arithmetic number, because the mean of its divisors is an integer number (13708494).

Almost surely, 2^216457746 is an apocalyptic number.

216457746 is an abundant number, since it is smaller than the sum of its proper divisors (222214062).

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

216457746 is a wasteful number, since it uses less digits than its factorization.

216457746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306.

The product of its digits is 282240, while the sum is 42.

The square root of 216457746 is about 14712.5030501271. The cubic root of 216457746 is about 600.4235398419.

The spelling of 216457746 in words is "two hundred sixteen million, four hundred fifty-seven thousand, seven hundred forty-six".