423440142 has 16 divisors (see below), whose sum is σ = 847117440. Its totient is φ = 141107192.

The previous prime is 423440123. The next prime is 423440153. The reversal of 423440142 is 241044324.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20533 + ... + 35615.

It is an arithmetic number, because the mean of its divisors is an integer number (52944840).

Almost surely, 2^423440142 is an apocalyptic number.

423440142 is an abundant number, since it is smaller than the sum of its proper divisors (423677298).

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

423440142 is a wasteful number, since it uses less digits than its factorization.

423440142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19767.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 423440142 is about 20577.6612373710. The cubic root of 423440142 is about 750.9263469263.

Adding to 423440142 its reverse (241044324), we get a palindrome (664484466).

The spelling of 423440142 in words is "four hundred twenty-three million, four hundred forty thousand, one hundred forty-two".