428276646685 has 32 divisors (see below), whose sum is σ = 537276856320. Its totient is φ = 327400538112.

The previous prime is 428276646683. The next prime is 428276646703. The reversal of 428276646685 is 586646672824.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 428276646685 - 2¹ = 428276646683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428276646683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11846557 + ... + 11882653.

It is an arithmetic number, because the mean of its divisors is an integer number (16789901760).

Almost surely, 2^428276646685 is an apocalyptic number.

It is an amenable number.

428276646685 is a deficient number, since it is larger than the sum of its proper divisors (109000209635).

428276646685 is a wasteful number, since it uses less digits than its factorization.

428276646685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37285.

The product of its digits is 185794560, while the sum is 64.

The spelling of 428276646685 in words is "four hundred twenty-eight billion, two hundred seventy-six million, six hundred forty-six thousand, six hundred eighty-five".