1949682889 has 16 divisors (see below), whose sum is σ = 2431872000. Its totient is φ = 1518546960.

The previous prime is 1949682887. The next prime is 1949682899. The reversal of 1949682889 is 9882869491.

It is not a de Polignac number, because 1949682889 - 2¹ = 1949682887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1949682889.

It is not an unprimeable number, because it can be changed into a prime (1949682887) 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, 226702 + ... + 235144.

It is an arithmetic number, because the mean of its divisors is an integer number (151992000).

Almost surely, 2^1949682889 is an apocalyptic number.

It is an amenable number.

1949682889 is a deficient number, since it is larger than the sum of its proper divisors (482189111).

1949682889 is a wasteful number, since it uses less digits than its factorization.

1949682889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11460.

The product of its digits is 17915904, while the sum is 64.

The square root of 1949682889 is about 44155.2136106259. The cubic root of 1949682889 is about 1249.2652511866.

The spelling of 1949682889 in words is "one billion, nine hundred forty-nine million, six hundred eighty-two thousand, eight hundred eighty-nine".