428106069638 has 64 divisors (see below), whose sum is σ = 731026296000. Its totient is φ = 186399719424.

The previous prime is 428106069631. The next prime is 428106069647. The reversal of 428106069638 is 836960601824.

It is a super-2 number, since 2×428106069638² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 428106069638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428106069631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147774206 + ... + 147777102.

It is an arithmetic number, because the mean of its divisors is an integer number (11422285875).

Almost surely, 2^428106069638 is an apocalyptic number.

428106069638 is a deficient number, since it is larger than the sum of its proper divisors (302920226362).

428106069638 is a wasteful number, since it uses less digits than its factorization.

428106069638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089.

The product of its (nonzero) digits is 2985984, while the sum is 53.

The spelling of 428106069638 in words is "four hundred twenty-eight billion, one hundred six million, sixty-nine thousand, six hundred thirty-eight".