212738842 has 8 divisors (see below), whose sum is σ = 324339732. Its totient is φ = 104625600.

The previous prime is 212738831. The next prime is 212738849. The reversal of 212738842 is 248837212.

It can be written as a sum of positive squares in 2 ways, for example, as 179318881 + 33419961 = 13391^2 + 5781^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (212738849) 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 3 ways as a sum of consecutive naturals, for example, 871759 + ... + 872002.

Almost surely, 2^212738842 is an apocalyptic number.

212738842 is a deficient number, since it is larger than the sum of its proper divisors (111600890).

212738842 is a wasteful number, since it uses less digits than its factorization.

212738842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743824.

The product of its digits is 43008, while the sum is 37.

The square root of 212738842 is about 14585.5696494858. The cubic root of 212738842 is about 596.9650839500.

The spelling of 212738842 in words is "two hundred twelve million, seven hundred thirty-eight thousand, eight hundred forty-two".