420340434 has 8 divisors (see below), whose sum is σ = 840680880. Its totient is φ = 140113476.

The previous prime is 420340423. The next prime is 420340441. The reversal of 420340434 is 434043024.

It is a happy number.

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

420340434 is an admirable 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, 35028364 + ... + 35028375.

It is an arithmetic number, because the mean of its divisors is an integer number (105085110).

Almost surely, 2^420340434 is an apocalyptic number.

420340434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

420340434 is a wasteful number, since it uses less digits than its factorization.

420340434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70056744.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 420340434 is about 20502.2055886678. The cubic root of 420340434 is about 749.0895227110.

Adding to 420340434 its reverse (434043024), we get a palindrome (854383458).

The spelling of 420340434 in words is "four hundred twenty million, three hundred forty thousand, four hundred thirty-four".