420018740 has 24 divisors (see below), whose sum is σ = 889849800. Its totient is φ = 166519808.

The previous prime is 420018727. The next prime is 420018749. The reversal of 420018740 is 47810024.

It can be written as a sum of positive squares in 4 ways, for example, as 37503376 + 382515364 = 6124^2 + 19558^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420018749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90665 + ... + 95184.

It is an arithmetic number, because the mean of its divisors is an integer number (37077075).

Almost surely, 2^420018740 is an apocalyptic number.

It is an amenable number.

420018740 is an abundant number, since it is smaller than the sum of its proper divisors (469831060).

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

420018740 is a wasteful number, since it uses less digits than its factorization.

420018740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185971 (or 185969 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 420018740 is about 20494.3587360034. The cubic root of 420018740 is about 748.8983767680.

Adding to 420018740 its reverse (47810024), we get a palindrome (467828764).

The spelling of 420018740 in words is "four hundred twenty million, eighteen thousand, seven hundred forty".