420440342 has 8 divisors (see below), whose sum is σ = 720754896. Its totient is φ = 180188712.

The previous prime is 420440329. The next prime is 420440357. The reversal of 420440342 is 243044024.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15015713 + ... + 15015740.

It is an arithmetic number, because the mean of its divisors is an integer number (90094362).

Almost surely, 2^420440342 is an apocalyptic number.

420440342 is a deficient number, since it is larger than the sum of its proper divisors (300314554).

420440342 is a wasteful number, since it uses less digits than its factorization.

420440342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30031462.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 420440342 is about 20504.6419622485. The cubic root of 420440342 is about 749.1488667580.

Adding to 420440342 its reverse (243044024), we get a palindrome (663484366).

The spelling of 420440342 in words is "four hundred twenty million, four hundred forty thousand, three hundred forty-two".