28194991110 has 384 divisors, whose sum is σ = 91537205760. Its totient is φ = 6152371200.

The previous prime is 28194991103. The next prime is 28194991129. The reversal of 28194991110 is 1119949182.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 14246101 + ... + 14248079.

It is an arithmetic number, because the mean of its divisors is an integer number (238378140).

Almost surely, 2^28194991110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28194991110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45768602880).

28194991110 is an abundant number, since it is smaller than the sum of its proper divisors (63342214650).

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

28194991110 is a wasteful number, since it uses less digits than its factorization.

28194991110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066 (or 2054 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The spelling of 28194991110 in words is "twenty-eight billion, one hundred ninety-four million, nine hundred ninety-one thousand, one hundred ten".