28911889562 has 32 divisors (see below), whose sum is σ = 48450934080. Its totient is φ = 12858773760.

The previous prime is 28911889553. The next prime is 28911889609. The reversal of 28911889562 is 26598811982.

It is a super-3 number, since 3×28911889562³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218813 + ... + 325119.

It is an arithmetic number, because the mean of its divisors is an integer number (1514091690).

Almost surely, 2^28911889562 is an apocalyptic number.

28911889562 is a deficient number, since it is larger than the sum of its proper divisors (19539044518).

28911889562 is a wasteful number, since it uses less digits than its factorization.

28911889562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106766.

The product of its digits is 4976640, while the sum is 59.

The spelling of 28911889562 in words is "twenty-eight billion, nine hundred eleven million, eight hundred eighty-nine thousand, five hundred sixty-two".