1894889549 has 16 divisors (see below), whose sum is σ = 2208401280. Its totient is φ = 1592136000.

The previous prime is 1894889519. The next prime is 1894889593. The reversal of 1894889549 is 9459884981.

It is a de Polignac number, because none of the positive numbers 2^k-1894889549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1894889519) 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, 833987 + ... + 836255.

It is an arithmetic number, because the mean of its divisors is an integer number (138025080).

Almost surely, 2^1894889549 is an apocalyptic number.

It is an amenable number.

1894889549 is a deficient number, since it is larger than the sum of its proper divisors (313511731).

1894889549 is a wasteful number, since it uses less digits than its factorization.

1894889549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580.

The product of its digits is 29859840, while the sum is 65.

The square root of 1894889549 is about 43530.3290706606. The cubic root of 1894889549 is about 1237.4508742734.

The spelling of 1894889549 in words is "one billion, eight hundred ninety-four million, eight hundred eighty-nine thousand, five hundred forty-nine".