28778201007684 has 48 divisors (see below), whose sum is σ = 69501068904960. Its totient is φ = 9258402424320.

The previous prime is 28778201007601. The next prime is 28778201007697. The reversal of 28778201007684 is 48670010287782.

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, 103561989 + ... + 103839500.

It is an arithmetic number, because the mean of its divisors is an integer number (1447938935520).

Almost surely, 2^{28778201007684} is an apocalyptic number.

It is an amenable number.

28778201007684 is an abundant number, since it is smaller than the sum of its proper divisors (40722867897276).

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

28778201007684 is a wasteful number, since it uses less digits than its factorization.

28778201007684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207401900 (or 207401898 counting only the distinct ones).

The product of its (nonzero) digits is 16859136, while the sum is 60.

The spelling of 28778201007684 in words is "twenty-eight trillion, seven hundred seventy-eight billion, two hundred one million, seven thousand, six hundred eighty-four".