28726447950 has 72 divisors (see below), whose sum is σ = 77243483928. Its totient is φ = 7653925440.

The previous prime is 28726447949. The next prime is 28726447961. The reversal of 28726447950 is 5974462782.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 519537 + ... + 572163.

Almost surely, 2^28726447950 is an apocalyptic number.

28726447950 is an abundant number, since it is smaller than the sum of its proper divisors (48517035978).

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

28726447950 is a wasteful number, since it uses less digits than its factorization.

28726447950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53858 (or 53850 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 28726447950 in words is "twenty-eight billion, seven hundred twenty-six million, four hundred forty-seven thousand, nine hundred fifty".