420910804 has 6 divisors (see below), whose sum is σ = 736593914. Its totient is φ = 210455400.

The previous prime is 420910759. The next prime is 420910811. The reversal of 420910804 is 408019024.

It can be written as a sum of positive squares in only one way, i.e., 402403600 + 18507204 = 20060^2 + 4302^2 .

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, 52613847 + ... + 52613854.

Almost surely, 2^420910804 is an apocalyptic number.

It is an amenable number.

420910804 is a deficient number, since it is larger than the sum of its proper divisors (315683110).

420910804 is a wasteful number, since it uses less digits than its factorization.

420910804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105227705 (or 105227703 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 420910804 is about 20516.1108400203. The cubic root of 420910804 is about 749.4281887459.

Adding to 420910804 its reverse (408019024), we get a palindrome (828929828).

The spelling of 420910804 in words is "four hundred twenty million, nine hundred ten thousand, eight hundred four".