28695880980 has 288 divisors, whose sum is σ = 98107376640. Its totient is φ = 6740858880.

The previous prime is 28695880979. The next prime is 28695880991. The reversal of 28695880980 is 8908859682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5292711 + ... + 5298129.

Almost surely, 2^28695880980 is an apocalyptic number.

28695880980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28695880980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49053688320).

28695880980 is an abundant number, since it is smaller than the sum of its proper divisors (69411495660).

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

28695880980 is a wasteful number, since it uses less digits than its factorization.

28695880980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551 (or 5546 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 63.

The spelling of 28695880980 in words is "twenty-eight billion, six hundred ninety-five million, eight hundred eighty thousand, nine hundred eighty".