28712422189389 has 64 divisors (see below), whose sum is σ = 41954948904960. Its totient is φ = 17403765857280.

The previous prime is 28712422189349. The next prime is 28712422189487. The reversal of 28712422189389 is 98398122421782.

It is a happy number.

It is not a de Polignac number, because 28712422189389 - 2¹¹ = 28712422187341 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28712422189349) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 113706817 + ... + 113959049.

It is an arithmetic number, because the mean of its divisors is an integer number (655546076640).

Almost surely, 2^{28712422189389} is an apocalyptic number.

It is an amenable number.

28712422189389 is a deficient number, since it is larger than the sum of its proper divisors (13242526715571).

28712422189389 is a wasteful number, since it uses less digits than its factorization.

28712422189389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253090.

The product of its digits is 55738368, while the sum is 66.

The spelling of 28712422189389 in words is "twenty-eight trillion, seven hundred twelve billion, four hundred twenty-two million, one hundred eighty-nine thousand, three hundred eighty-nine".