1940351439 has 16 divisors (see below), whose sum is σ = 2787573600. Its totient is φ = 1193450496.

The previous prime is 1940351429. The next prime is 1940351471. The reversal of 1940351439 is 9341530491.

It is a happy number.

It is not a de Polignac number, because 1940351439 - 2⁵ = 1940351407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1940351397 and 1940351406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940351419) 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, 71347 + ... + 94715.

It is an arithmetic number, because the mean of its divisors is an integer number (174223350).

Almost surely, 2^1940351439 is an apocalyptic number.

1940351439 is a deficient number, since it is larger than the sum of its proper divisors (847222161).

1940351439 is a wasteful number, since it uses less digits than its factorization.

1940351439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25514.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 1940351439 is about 44049.4204161644. The cubic root of 1940351439 is about 1247.2690113595.

The spelling of 1940351439 in words is "one billion, nine hundred forty million, three hundred fifty-one thousand, four hundred thirty-nine".