28054850802489 has 27 divisors (see below), whose sum is σ = 47139970219173. Its totient is φ = 16031279755512.

The previous prime is 28054850802467. The next prime is 28054850802533. The reversal of 28054850802489 is 98420805845082.

The square root of 28054850802489 is 5296683.

It is a perfect power (a square), and thus also a powerful number.

28054850802489 is a `hidden beast` number, since 2 + 8 + 0 + 5 + 48 + 508 + 0 + 2 + 4 + 89 = 666.

It is not a de Polignac number, because 28054850802489 - 2²⁷ = 28054716584761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (28054850802289) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 111104232 + ... + 111356454.

Almost surely, 2^{28054850802489} is an apocalyptic number.

28054850802489 is the 5296683-rd square number.

28054850802489 is the 2648342-nd centered octagonal number.

It is an amenable number.

28054850802489 is a deficient number, since it is larger than the sum of its proper divisors (19085119416684).

28054850802489 is an frugal number, since it uses more digits than its factorization.

28054850802489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504466 (or 252233 counting only the distinct ones).

The product of its (nonzero) digits is 58982400, while the sum is 63.

The spelling of 28054850802489 in words is "twenty-eight trillion, fifty-four billion, eight hundred fifty million, eight hundred two thousand, four hundred eighty-nine".