420824223698 has 18 divisors (see below), whose sum is σ = 652299734853. Its totient is φ = 203610863160.

The previous prime is 420824223697. The next prime is 420824223709. The reversal of 420824223698 is 896322428024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 413252265409 + 7571958289 = 642847^2 + 87017^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=458707.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420824223697) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 28432436 + ... + 28447232.

Almost surely, 2^420824223698 is an apocalyptic number.

420824223698 is a deficient number, since it is larger than the sum of its proper divisors (231475511155).

420824223698 is an frugal number, since it uses more digits than its factorization.

420824223698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29658 (or 14830 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 50.

Multiplying 420824223698 by its sum of digits (50), we get a square (21041211184900 = 4587070²).

The spelling of 420824223698 in words is "four hundred twenty billion, eight hundred twenty-four million, two hundred twenty-three thousand, six hundred ninety-eight".