1889748138 has 32 divisors (see below), whose sum is σ = 3976338240. Its totient is φ = 597939840.

The previous prime is 1889748121. The next prime is 1889748139. The reversal of 1889748138 is 8318479881.

It is a super-2 number, since 2×1889748138² = 7142296050148934088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1889748139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94708 + ... + 112911.

It is an arithmetic number, because the mean of its divisors is an integer number (124260570).

Almost surely, 2^1889748138 is an apocalyptic number.

1889748138 is an abundant number, since it is smaller than the sum of its proper divisors (2086590102).

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

1889748138 is a wasteful number, since it uses less digits than its factorization.

1889748138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207702.

The product of its digits is 3096576, while the sum is 57.

The square root of 1889748138 is about 43471.2334538600. The cubic root of 1889748138 is about 1236.3306671241.

The spelling of 1889748138 in words is "one billion, eight hundred eighty-nine million, seven hundred forty-eight thousand, one hundred thirty-eight".