420024431 has 8 divisors (see below), whose sum is σ = 444846720. Its totient is φ = 395473752.

The previous prime is 420024379. The next prime is 420024439. The reversal of 420024431 is 134420024.

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

It is a de Polignac number, because none of the positive numbers 2^k-420024431 is a prime.

It is a super-2 number, since 2×420024431² = 352841045273747522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420024439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64715 + ... + 70908.

It is an arithmetic number, because the mean of its divisors is an integer number (55605840).

Almost surely, 2^420024431 is an apocalyptic number.

420024431 is a deficient number, since it is larger than the sum of its proper divisors (24822289).

420024431 is a wasteful number, since it uses less digits than its factorization.

420024431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135805.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 420024431 is about 20494.4975786185. The cubic root of 420024431 is about 748.9017591261.

Adding to 420024431 its reverse (134420024), we get a palindrome (554444455).

The spelling of 420024431 in words is "four hundred twenty million, twenty-four thousand, four hundred thirty-one".