28176602864420 has 12 divisors (see below), whose sum is σ = 59170866015324. Its totient is φ = 11270641145760.

The previous prime is 28176602864407. The next prime is 28176602864429. The reversal of 28176602864420 is 2446820667182.

It can be written as a sum of positive squares in 2 ways, for example, as 9820313852644 + 18356289011776 = 3133738^2 + 4284424^2 .

It is not an unprimeable number, because it can be changed into a prime (28176602864429) 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 3 ways as a sum of consecutive naturals, for example, 704415071591 + ... + 704415071630.

It is an arithmetic number, because the mean of its divisors is an integer number (4930905501277).

Almost surely, 2^{28176602864420} is an apocalyptic number.

28176602864420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28176602864420 is an abundant number, since it is smaller than the sum of its proper divisors (30994263150904).

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

28176602864420 is a wasteful number, since it uses less digits than its factorization.

28176602864420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408830143230 (or 1408830143228 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 56.

The spelling of 28176602864420 in words is "twenty-eight trillion, one hundred seventy-six billion, six hundred two million, eight hundred sixty-four thousand, four hundred twenty".