216738742 has 16 divisors (see below), whose sum is σ = 360676800. Its totient is φ = 96847240.

The previous prime is 216738733. The next prime is 216738773. The reversal of 216738742 is 247837612.

It is a junction number, because it is equal to n+sod(n) for n = 216738695 and 216738704.

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 7 ways as a sum of consecutive naturals, for example, 82192 + ... + 84787.

It is an arithmetic number, because the mean of its divisors is an integer number (22542300).

Almost surely, 2^216738742 is an apocalyptic number.

216738742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

216738742 is a deficient number, since it is larger than the sum of its proper divisors (143938058).

216738742 is a wasteful number, since it uses less digits than its factorization.

216738742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167051.

The product of its digits is 112896, while the sum is 40.

The square root of 216738742 is about 14722.0495176453. The cubic root of 216738742 is about 600.6832420422.

The spelling of 216738742 in words is "two hundred sixteen million, seven hundred thirty-eight thousand, seven hundred forty-two".