2800891489 has 4 divisors (see below), whose sum is σ = 3055518000. Its totient is φ = 2546264980.

The previous prime is 2800891439. The next prime is 2800891501. The reversal of 2800891489 is 9841980082.

2800891489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2800891489 - 2³¹ = 653407841 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2800891409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127313239 + ... + 127313260.

It is an arithmetic number, because the mean of its divisors is an integer number (763879500).

Almost surely, 2^2800891489 is an apocalyptic number.

It is an amenable number.

2800891489 is a deficient number, since it is larger than the sum of its proper divisors (254626511).

2800891489 is a wasteful number, since it uses less digits than its factorization.

2800891489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254626510.

The product of its (nonzero) digits is 331776, while the sum is 49.

The square root of 2800891489 is about 52923.4493301410. The cubic root of 2800891489 is about 1409.6093159998.

The spelling of 2800891489 in words is "two billion, eight hundred million, eight hundred ninety-one thousand, four hundred eighty-nine".