426640216 has 16 divisors (see below), whose sum is σ = 800186400. Its totient is φ = 213257184.

The previous prime is 426640213. The next prime is 426640217. The reversal of 426640216 is 612046624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426640213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34150 + ... + 44938.

It is an arithmetic number, because the mean of its divisors is an integer number (50011650).

Almost surely, 2^426640216 is an apocalyptic number.

It is an amenable number.

426640216 is a deficient number, since it is larger than the sum of its proper divisors (373546184).

426640216 is a wasteful number, since it uses less digits than its factorization.

426640216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15738 (or 15734 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 426640216 is about 20655.2709011526. The cubic root of 426640216 is about 752.8132658894.

The spelling of 426640216 in words is "four hundred twenty-six million, six hundred forty thousand, two hundred sixteen".