28347867004434 has 64 divisors (see below), whose sum is σ = 57919716900864. Its totient is φ = 9246269230016.

The previous prime is 28347867004423. The next prime is 28347867004453. The reversal of 28347867004434 is 43440076874382.

It is an unprimeable number.

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, 237792007 + ... + 237911189.

It is an arithmetic number, because the mean of its divisors is an integer number (904995576576).

Almost surely, 2^{28347867004434} is an apocalyptic number.

28347867004434 is an abundant number, since it is smaller than the sum of its proper divisors (29571849896430).

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

28347867004434 is a wasteful number, since it uses less digits than its factorization.

28347867004434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121231.

The product of its (nonzero) digits is 86704128, while the sum is 60.

The spelling of 28347867004434 in words is "twenty-eight trillion, three hundred forty-seven billion, eight hundred sixty-seven million, four thousand, four hundred thirty-four".