28178537280140 has 48 divisors (see below), whose sum is σ = 63732310182912. Its totient is φ = 10403490859776.

The previous prime is 28178537280137. The next prime is 28178537280149. The reversal of 28178537280140 is 4108273587182.

It is not an unprimeable number, because it can be changed into a prime (28178537280149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1604684 + ... + 7676723.

It is an arithmetic number, because the mean of its divisors is an integer number (1327756462144).

Almost surely, 2^{28178537280140} is an apocalyptic number.

28178537280140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28178537280140 is an abundant number, since it is smaller than the sum of its proper divisors (35553772902772).

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

28178537280140 is a wasteful number, since it uses less digits than its factorization.

28178537280140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9293106 (or 9293104 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 56.

The spelling of 28178537280140 in words is "twenty-eight trillion, one hundred seventy-eight billion, five hundred thirty-seven million, two hundred eighty thousand, one hundred forty".