28178778038790 has 16 divisors (see below), whose sum is σ = 67629067293168. Its totient is φ = 7514340810336.

The previous prime is 28178778038771. The next prime is 28178778038809. The reversal of 28178778038790 is 9783087787182.

It is an interprime number because it is at equal distance from previous prime (28178778038771) and next prime (28178778038809).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469646300617 + ... + 469646300676.

It is an arithmetic number, because the mean of its divisors is an integer number (4226816705823).

Almost surely, 2^{28178778038790} is an apocalyptic number.

28178778038790 is an abundant number, since it is smaller than the sum of its proper divisors (39450289254378).

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

28178778038790 is a wasteful number, since it uses less digits than its factorization.

28178778038790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939292601303.

The product of its (nonzero) digits is 531062784, while the sum is 75.

The spelling of 28178778038790 in words is "twenty-eight trillion, one hundred seventy-eight billion, seven hundred seventy-eight million, thirty-eight thousand, seven hundred ninety".