1871424381 has 8 divisors (see below), whose sum is σ = 2504050720. Its totient is φ = 1243207152.

The previous prime is 1871424343. The next prime is 1871424391. The reversal of 1871424381 is 1834241781.

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

It is a de Polignac number, because none of the positive numbers 2^k-1871424381 is a prime.

It is a super-2 number, since 2×1871424381² = 7004458427602466322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1871424391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1101286 + ... + 1102983.

It is an arithmetic number, because the mean of its divisors is an integer number (313006340).

Almost surely, 2^1871424381 is an apocalyptic number.

It is an amenable number.

1871424381 is a deficient number, since it is larger than the sum of its proper divisors (632626339).

1871424381 is a wasteful number, since it uses less digits than its factorization.

1871424381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204555.

The product of its digits is 43008, while the sum is 39.

The square root of 1871424381 is about 43259.9627947135. The cubic root of 1871424381 is about 1232.3216952856.

The spelling of 1871424381 in words is "one billion, eight hundred seventy-one million, four hundred twenty-four thousand, three hundred eighty-one".