420404026 has 12 divisors (see below), whose sum is σ = 733562298. Its totient is φ = 180173112.

The previous prime is 420404011. The next prime is 420404053. The reversal of 420404026 is 620404024.

It can be written as a sum of positive squares in only one way, i.e., 396049801 + 24354225 = 19901^2 + 4935^2 .

It is a junction number, because it is equal to n+sod(n) for n = 420403988 and 420404006.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2144821 + ... + 2145016.

Almost surely, 2^420404026 is an apocalyptic number.

420404026 is a deficient number, since it is larger than the sum of its proper divisors (313158272).

420404026 is a wasteful number, since it uses less digits than its factorization.

420404026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289853 (or 4289846 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 420404026 is about 20503.7563875501. The cubic root of 420404026 is about 749.1272966160.

The spelling of 420404026 in words is "four hundred twenty million, four hundred four thousand, twenty-six".