428620486831 has 4 divisors (see below), whose sum is σ = 428826259672. Its totient is φ = 428414713992.

The previous prime is 428620486813. The next prime is 428620486859. The reversal of 428620486831 is 138684026824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428620486831 - 2¹¹ = 428620484783 is a prime.

It is a super-2 number, since 2×428620486831² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428620486631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102883296 + ... + 102887461.

It is an arithmetic number, because the mean of its divisors is an integer number (107206564918).

Almost surely, 2^428620486831 is an apocalyptic number.

428620486831 is a deficient number, since it is larger than the sum of its proper divisors (205772841).

428620486831 is a wasteful number, since it uses less digits than its factorization.

428620486831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205772840.

The product of its (nonzero) digits is 3538944, while the sum is 52.

The spelling of 428620486831 in words is "four hundred twenty-eight billion, six hundred twenty million, four hundred eighty-six thousand, eight hundred thirty-one".