1940457865 has 8 divisors (see below), whose sum is σ = 2403664128. Its totient is φ = 1502289840.

The previous prime is 1940457829. The next prime is 1940457887. The reversal of 1940457865 is 5687540491.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1940457865 - 2²¹ = 1938360713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6259387 + ... + 6259696.

It is an arithmetic number, because the mean of its divisors is an integer number (300458016).

Almost surely, 2^1940457865 is an apocalyptic number.

It is an amenable number.

1940457865 is a deficient number, since it is larger than the sum of its proper divisors (463206263).

1940457865 is a wasteful number, since it uses less digits than its factorization.

1940457865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12519119.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 1940457865 is about 44050.6284291155. The cubic root of 1940457865 is about 1247.2918146899.

The spelling of 1940457865 in words is "one billion, nine hundred forty million, four hundred fifty-seven thousand, eight hundred sixty-five".