420534340 has 12 divisors (see below), whose sum is σ = 883122156. Its totient is φ = 168213728.

The previous prime is 420534337. The next prime is 420534377. The reversal of 420534340 is 43435024.

It can be written as a sum of positive squares in 2 ways, for example, as 118330884 + 302203456 = 10878^2 + 17384^2 .

It is a super-2 number, since 2×420534340² = 353698262238471200, which contains 22 as substring.

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, 10513339 + ... + 10513378.

It is an arithmetic number, because the mean of its divisors is an integer number (73593513).

Almost surely, 2^420534340 is an apocalyptic number.

It is an amenable number.

420534340 is an abundant number, since it is smaller than the sum of its proper divisors (462587816).

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

420534340 is a wasteful number, since it uses less digits than its factorization.

420534340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21026726 (or 21026724 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 420534340 is about 20506.9339492768. The cubic root of 420534340 is about 749.2046917593.

Adding to 420534340 its reverse (43435024), we get a palindrome (463969364).

The spelling of 420534340 in words is "four hundred twenty million, five hundred thirty-four thousand, three hundred forty".