28011378750 has 80 divisors (see below), whose sum is σ = 70081866624. Its totient is φ = 7461612000.

The previous prime is 28011378743. The next prime is 28011378751. The reversal of 28011378750 is 5787311082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28011378751) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 3982737 + ... + 3989763.

Almost surely, 2^28011378750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28011378750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35040933312).

28011378750 is an abundant number, since it is smaller than the sum of its proper divisors (42070487874).

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

28011378750 is a wasteful number, since it uses less digits than its factorization.

28011378750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8115 (or 8100 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 42.

The spelling of 28011378750 in words is "twenty-eight billion, eleven million, three hundred seventy-eight thousand, seven hundred fifty".