28611487385 has 8 divisors (see below), whose sum is σ = 36974845320. Its totient is φ = 21128482944.

The previous prime is 28611487363. The next prime is 28611487423. The reversal of 28611487385 is 58378411682.

It can be written as a sum of positive squares in 4 ways, for example, as 336392281 + 28275095104 = 18341^2 + 168152^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28611487385 - 2⁸ = 28611487129 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220088300 + ... + 220088429.

It is an arithmetic number, because the mean of its divisors is an integer number (4621855665).

Almost surely, 2^28611487385 is an apocalyptic number.

It is an amenable number.

28611487385 is a deficient number, since it is larger than the sum of its proper divisors (8363357935).

28611487385 is a wasteful number, since it uses less digits than its factorization.

28611487385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440176747.

The product of its digits is 2580480, while the sum is 53.

The spelling of 28611487385 in words is "twenty-eight billion, six hundred eleven million, four hundred eighty-seven thousand, three hundred eighty-five".