28428424420660 has 48 divisors (see below), whose sum is σ = 65639746529280. Its totient is φ = 10256210375040.

The previous prime is 28428424420651. The next prime is 28428424420681. The reversal of 28428424420660 is 6602442482482.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28428424420598 and 28428424420607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508712655 + ... + 508768534.

It is an arithmetic number, because the mean of its divisors is an integer number (1367494719360).

Almost surely, 2^{28428424420660} is an apocalyptic number.

28428424420660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28428424420660 is an abundant number, since it is smaller than the sum of its proper divisors (37211322108620).

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

28428424420660 is a wasteful number, since it uses less digits than its factorization.

28428424420660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017481336 (or 1017481334 counting only the distinct ones).

The product of its (nonzero) digits is 9437184, while the sum is 52.

The spelling of 28428424420660 in words is "twenty-eight trillion, four hundred twenty-eight billion, four hundred twenty-four million, four hundred twenty thousand, six hundred sixty".