28705090650 has 48 divisors (see below), whose sum is σ = 71199681024. Its totient is φ = 7653502080.

The previous prime is 28705090649. The next prime is 28705090709. The reversal of 28705090650 is 5609050782.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1404807 + ... + 1425093.

It is an arithmetic number, because the mean of its divisors is an integer number (1483326688).

Almost surely, 2^28705090650 is an apocalyptic number.

28705090650 is an abundant number, since it is smaller than the sum of its proper divisors (42494590374).

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

28705090650 is a wasteful number, since it uses less digits than its factorization.

28705090650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29735 (or 29730 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 28705090650 in words is "twenty-eight billion, seven hundred five million, ninety thousand, six hundred fifty".