28720057159 has 16 divisors (see below), whose sum is σ = 31202448480. Its totient is φ = 26327946240.

The previous prime is 28720057153. The next prime is 28720057181. The reversal of 28720057159 is 95175002782.

It is a happy number.

It is not a de Polignac number, because 28720057159 - 2³³ = 20130122567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28720057153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393652 + ... + 460870.

It is an arithmetic number, because the mean of its divisors is an integer number (1950153030).

Almost surely, 2^28720057159 is an apocalyptic number.

28720057159 is a deficient number, since it is larger than the sum of its proper divisors (2482391321).

28720057159 is a wasteful number, since it uses less digits than its factorization.

28720057159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67890.

The product of its (nonzero) digits is 352800, while the sum is 46.

The spelling of 28720057159 in words is "twenty-eight billion, seven hundred twenty million, fifty-seven thousand, one hundred fifty-nine".