1940089865 has 16 divisors (see below), whose sum is σ = 2725591680. Its totient is φ = 1297898880.

The previous prime is 1940089819. The next prime is 1940089883. The reversal of 1940089865 is 5689800491.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1940089865 is a prime.

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, 674555 + ... + 677424.

It is an arithmetic number, because the mean of its divisors is an integer number (170349480).

Almost surely, 2^1940089865 is an apocalyptic number.

It is an amenable number.

1940089865 is a deficient number, since it is larger than the sum of its proper divisors (785501815).

1940089865 is a wasteful number, since it uses less digits than its factorization.

1940089865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352032.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 1940089865 is about 44046.4512191391. The cubic root of 1940089865 is about 1247.2129617526.

The spelling of 1940089865 in words is "one billion, nine hundred forty million, eighty-nine thousand, eight hundred sixty-five".