28890771910 has 144 divisors (see below), whose sum is σ = 71609883408. Its totient is φ = 8312008320.

The previous prime is 28890771869. The next prime is 28890771919. The reversal of 28890771910 is 1917709882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28890771919) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 752029 + ... + 789511.

It is an arithmetic number, because the mean of its divisors is an integer number (497290857).

Almost surely, 2^28890771910 is an apocalyptic number.

28890771910 is an abundant number, since it is smaller than the sum of its proper divisors (42719111498).

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

28890771910 is a wasteful number, since it uses less digits than its factorization.

28890771910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37539 (or 37521 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 52.

The spelling of 28890771910 in words is "twenty-eight billion, eight hundred ninety million, seven hundred seventy-one thousand, nine hundred ten".