442421433 has 10 divisors (see below), whose sum is σ = 660901274. Its totient is φ = 294947568.

The previous prime is 442421417. The next prime is 442421437. The reversal of 442421433 is 334124244.

It is a happy number.

442421433 is a `hidden beast` number, since 442 + 4 + 214 + 3 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 225360144 + 217061289 = 15012^2 + 14733^2 .

It is not a de Polignac number, because 442421433 - 2⁴ = 442421417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442421397 and 442421406.

It is not an unprimeable number, because it can be changed into a prime (442421437) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2730916 + ... + 2731077.

Almost surely, 2^442421433 is an apocalyptic number.

It is an amenable number.

442421433 is a deficient number, since it is larger than the sum of its proper divisors (218479841).

442421433 is an equidigital number, since it uses as much as digits as its factorization.

442421433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5462005 (or 5461996 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 442421433 is about 21033.8164154772. The cubic root of 442421433 is about 761.9831820952.

Adding to 442421433 its reverse (334124244), we get a palindrome (776545677).

It can be divided in two parts, 442 and 421433, that added together give a cube (421875 = 75³).

The spelling of 442421433 in words is "four hundred forty-two million, four hundred twenty-one thousand, four hundred thirty-three".