420244340 has 24 divisors (see below), whose sum is σ = 887001192. Its totient is φ = 167242880.

The previous prime is 420244313. The next prime is 420244381. The reversal of 420244340 is 43442024.

It can be written as a sum of positive squares in 4 ways, for example, as 224580196 + 195664144 = 14986^2 + 13988^2 .

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, 49391 + ... + 57270.

It is an arithmetic number, because the mean of its divisors is an integer number (36958383).

Almost surely, 2^420244340 is an apocalyptic number.

It is an amenable number.

420244340 is an abundant number, since it is smaller than the sum of its proper divisors (466756852).

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

420244340 is a wasteful number, since it uses less digits than its factorization.

420244340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106867 (or 106865 counting only the distinct ones).

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

The square root of 420244340 is about 20499.8619507547. The cubic root of 420244340 is about 749.0324352577.

Adding to 420244340 its reverse (43442024), we get a palindrome (463686364).

It can be divided in two parts, 42024 and 4340, that added together give a palindrome (46364).

The spelling of 420244340 in words is "four hundred twenty million, two hundred forty-four thousand, three hundred forty".