420400611 has 20 divisors (see below), whose sum is σ = 639861552. Its totient is φ = 274976208.

The previous prime is 420400609. The next prime is 420400621. The reversal of 420400611 is 116004024.

It is not a de Polignac number, because 420400611 - 2¹ = 420400609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420400621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44671 + ... + 53256.

Almost surely, 2^420400611 is an apocalyptic number.

420400611 is a deficient number, since it is larger than the sum of its proper divisors (219460941).

420400611 is an equidigital number, since it uses as much as digits as its factorization.

420400611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97992 (or 97983 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 420400611 is about 20503.6731099576. The cubic root of 420400611 is about 749.1252681890.

Adding to 420400611 its reverse (116004024), we get a palindrome (536404635).

The spelling of 420400611 in words is "four hundred twenty million, four hundred thousand, six hundred eleven".