312020442 has 12 divisors (see below), whose sum is σ = 676044330. Its totient is φ = 104006808.

The previous prime is 312020441. The next prime is 312020447. The reversal of 312020442 is 244020213.

It can be written as a sum of positive squares in only one way, i.e., 304118721 + 7901721 = 17439^2 + 2811^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 17334469 = 312020442 / (3 + 1 + 2 + 0 + 2 + 0 + 4 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (312020441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8667217 + ... + 8667252.

Almost surely, 2^312020442 is an apocalyptic number.

312020442 is an abundant number, since it is smaller than the sum of its proper divisors (364023888).

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

312020442 is a wasteful number, since it uses less digits than its factorization.

312020442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17334477 (or 17334474 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 312020442 is about 17664.1003733561. The cubic root of 312020442 is about 678.2571009170.

Adding to 312020442 its reverse (244020213), we get a palindrome (556040655).

The spelling of 312020442 in words is "three hundred twelve million, twenty thousand, four hundred forty-two".