1839669381 has 32 divisors (see below), whose sum is σ = 2980467840. Its totient is φ = 1112227200.

The previous prime is 1839669313. The next prime is 1839669397.

1839669381 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1839669381 - 2¹³ = 1839661189 is a prime.

It is a super-2 number, since 2×1839669381² = 6768766862777846322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1839669581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117681 + ... + 132393.

It is an arithmetic number, because the mean of its divisors is an integer number (93139620).

Almost surely, 2^1839669381 is an apocalyptic number.

1839669381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1839669381 is a deficient number, since it is larger than the sum of its proper divisors (1140798459).

1839669381 is a wasteful number, since it uses less digits than its factorization.

1839669381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15154 (or 15148 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 1839669381 is about 42891.3672083323. The cubic root of 1839669381 is about 1225.3117365174.

The spelling of 1839669381 in words is "one billion, eight hundred thirty-nine million, six hundred sixty-nine thousand, three hundred eighty-one".