442212312 has 16 divisors (see below), whose sum is σ = 1105530840. Its totient is φ = 147404096.

The previous prime is 442212311. The next prime is 442212367. The reversal of 442212312 is 213212244.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442212311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9212733 + ... + 9212780.

Almost surely, 2^442212312 is an apocalyptic number.

It is an amenable number.

442212312 is an abundant number, since it is smaller than the sum of its proper divisors (663318528).

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

442212312 is a wasteful number, since it uses less digits than its factorization.

442212312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18425522 (or 18425518 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 442212312 is about 21028.8447614223. The cubic root of 442212312 is about 761.8631066904.

Adding to 442212312 its reverse (213212244), we get a palindrome (655424556).

It can be divided in two parts, 44 and 2212312, that added together give a triangular number (2212356 = T₂₁₀₃).

The spelling of 442212312 in words is "four hundred forty-two million, two hundred twelve thousand, three hundred twelve".