42643330 has 8 divisors (see below), whose sum is σ = 76758012. Its totient is φ = 17057328.

The previous prime is 42643313. The next prime is 42643333. The reversal of 42643330 is 3334624.

It can be written as a sum of positive squares in 2 ways, for example, as 41563809 + 1079521 = 6447^2 + 1039^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 42643295 and 42643304.

It is not an unprimeable number, because it can be changed into a prime (42643333) 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, 2132157 + ... + 2132176.

Almost surely, 2^42643330 is an apocalyptic number.

42643330 is a deficient number, since it is larger than the sum of its proper divisors (34114682).

42643330 is a wasteful number, since it uses less digits than its factorization.

42643330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264340.

The product of its (nonzero) digits is 5184, while the sum is 25.

The square root of 42643330 is about 6530.1860616678. The cubic root of 42643330 is about 349.3684666006.

Adding to 42643330 its reverse (3334624), we get a palindrome (45977954).

The spelling of 42643330 in words is "forty-two million, six hundred forty-three thousand, three hundred thirty".