216742734 has 24 divisors (see below), whose sum is σ = 505733592. Its totient is φ = 66690000.

The previous prime is 216742711. The next prime is 216742751. The reversal of 216742734 is 437247612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 462892 + ... + 463359.

It is an arithmetic number, because the mean of its divisors is an integer number (21072233).

Almost surely, 2^216742734 is an apocalyptic number.

216742734 is an abundant number, since it is smaller than the sum of its proper divisors (288990858).

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

216742734 is a wasteful number, since it uses less digits than its factorization.

216742734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926272 (or 926269 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 216742734 is about 14722.1850959700. The cubic root of 216742734 is about 600.6869299120.

The spelling of 216742734 in words is "two hundred sixteen million, seven hundred forty-two thousand, seven hundred thirty-four".