420440814 has 32 divisors (see below), whose sum is σ = 957106080. Its totient is φ = 136728000.

The previous prime is 420440809. The next prime is 420440827. The reversal of 420440814 is 418044024.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92737 + ... + 97164.

It is an arithmetic number, because the mean of its divisors is an integer number (29909565).

Almost surely, 2^420440814 is an apocalyptic number.

420440814 is an abundant number, since it is smaller than the sum of its proper divisors (536665266).

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

420440814 is a wasteful number, since it uses less digits than its factorization.

420440814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189953 (or 189947 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 420440814 is about 20504.6534718341. The cubic root of 420440814 is about 749.1491470975.

Adding to 420440814 its reverse (418044024), we get a palindrome (838484838).

The spelling of 420440814 in words is "four hundred twenty million, four hundred forty thousand, eight hundred fourteen".