1891539342 has 48 divisors (see below), whose sum is σ = 5109616512. Its totient is φ = 491308560.

The previous prime is 1891539337. The next prime is 1891539371. The reversal of 1891539342 is 2439351981.

It is a happy number.

1891539342 is a `hidden beast` number, since 1 + 89 + 1 + 539 + 34 + 2 = 666.

It is a super-3 number, since 3×1891539342³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 680988 + ... + 683759.

It is an arithmetic number, because the mean of its divisors is an integer number (106450344).

Almost surely, 2^1891539342 is an apocalyptic number.

1891539342 is an abundant number, since it is smaller than the sum of its proper divisors (3218077170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1891539342 is a wasteful number, since it uses less digits than its factorization.

1891539342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364773 (or 1364770 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 1891539342 is about 43491.8307501535. The cubic root of 1891539342 is about 1236.7211638045.

The spelling of 1891539342 in words is "one billion, eight hundred ninety-one million, five hundred thirty-nine thousand, three hundred forty-two".