420690440 has 16 divisors (see below), whose sum is σ = 946553580. Its totient is φ = 168276160.

The previous prime is 420690437. The next prime is 420690461. The reversal of 420690440 is 44096024.

It can be written as a sum of positive squares in 2 ways, for example, as 403929604 + 16760836 = 20098^2 + 4094^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5258591 + ... + 5258670.

Almost surely, 2^420690440 is an apocalyptic number.

420690440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420690440 is an abundant number, since it is smaller than the sum of its proper divisors (525863140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420690440 is a wasteful number, since it uses less digits than its factorization.

420690440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10517272 (or 10517268 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 420690440 is about 20510.7396258643. The cubic root of 420690440 is about 749.2973804918.

The spelling of 420690440 in words is "four hundred twenty million, six hundred ninety thousand, four hundred forty".