420435604 has 6 divisors (see below), whose sum is σ = 735762314. Its totient is φ = 210217800.

The previous prime is 420435599. The next prime is 420435611. The reversal of 420435604 is 406534024.

It can be written as a sum of positive squares in only one way, i.e., 259145604 + 161290000 = 16098^2 + 12700^2 .

It is a super-2 number, since 2×420435604² = 353532194221689632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52554447 + ... + 52554454.

Almost surely, 2^420435604 is an apocalyptic number.

It is an amenable number.

420435604 is a deficient number, since it is larger than the sum of its proper divisors (315326710).

420435604 is a wasteful number, since it uses less digits than its factorization.

420435604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105108905 (or 105108903 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 420435604 is about 20504.5264271087. The cubic root of 420435604 is about 749.1460526602.

Adding to 420435604 its reverse (406534024), we get a palindrome (826969628).

The spelling of 420435604 in words is "four hundred twenty million, four hundred thirty-five thousand, six hundred four".