420405562 has 16 divisors (see below), whose sum is σ = 648518400. Its totient is φ = 204313120.

The previous prime is 420405551. The next prime is 420405577. The reversal of 420405562 is 265504024.

It is a self number, because there is not a number n which added to its sum of digits gives 420405562.

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, 9514 + ... + 30517.

It is an arithmetic number, because the mean of its divisors is an integer number (40532400).

Almost surely, 2^420405562 is an apocalyptic number.

420405562 is a deficient number, since it is larger than the sum of its proper divisors (228112838).

420405562 is a wasteful number, since it uses less digits than its factorization.

420405562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40181.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 420405562 is about 20503.7938440670. The cubic root of 420405562 is about 749.1282089591.

Adding to 420405562 its reverse (265504024), we get a palindrome (685909586).

The spelling of 420405562 in words is "four hundred twenty million, four hundred five thousand, five hundred sixty-two".