426440169 has 12 divisors (see below), whose sum is σ = 617480500. Its totient is φ = 283595904.

The previous prime is 426440149. The next prime is 426440177. The reversal of 426440169 is 961044624.

426440169 is a `hidden beast` number, since 4 + 2 + 644 + 0 + 1 + 6 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 370370025 + 56070144 = 19245^2 + 7488^2 .

It is not a de Polignac number, because 426440169 - 2⁸ = 426439913 is a prime.

It is a super-2 number, since 2×426440169² = 363702435473497122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426440149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54244 + ... + 61605.

Almost surely, 2^426440169 is an apocalyptic number.

It is an amenable number.

426440169 is a deficient number, since it is larger than the sum of its proper divisors (191040331).

426440169 is a wasteful number, since it uses less digits than its factorization.

426440169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116264 (or 116261 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 426440169 is about 20650.4278163916. The cubic root of 426440169 is about 752.6955854850.

The spelling of 426440169 in words is "four hundred twenty-six million, four hundred forty thousand, one hundred sixty-nine".