312021444 has 48 divisors (see below), whose sum is σ = 854553728. Its totient is φ = 86738688.

The previous prime is 312021443. The next prime is 312021467. The reversal of 312021444 is 444120213.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 312021444.

It is not an unprimeable number, because it can be changed into a prime (312021443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47089 + ... + 53304.

Almost surely, 2^312021444 is an apocalyptic number.

It is an amenable number.

312021444 is an abundant number, since it is smaller than the sum of its proper divisors (542532284).

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

312021444 is a wasteful number, since it uses less digits than its factorization.

312021444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100444 (or 100442 counting only the distinct ones).

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

The square root of 312021444 is about 17664.1287359439. The cubic root of 312021444 is about 678.2578269516.

Adding to 312021444 its reverse (444120213), we get a palindrome (756141657).

The spelling of 312021444 in words is "three hundred twelve million, twenty-one thousand, four hundred forty-four".