1904881139 has 8 divisors (see below), whose sum is σ = 2213905920. Its totient is φ = 1605081096.

The previous prime is 1904881063. The next prime is 1904881141. The reversal of 1904881139 is 9311884091.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1904881139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1904881139.

It is not an unprimeable number, because it can be changed into a prime (1904881039) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2305739 + ... + 2306564.

It is an arithmetic number, because the mean of its divisors is an integer number (276738240).

Almost surely, 2^1904881139 is an apocalyptic number.

1904881139 is a deficient number, since it is larger than the sum of its proper divisors (309024781).

1904881139 is an equidigital number, since it uses as much as digits as its factorization.

1904881139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612369.

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 1904881139 is about 43644.9440256257. The cubic root of 1904881139 is about 1239.6220533462.

The spelling of 1904881139 in words is "one billion, nine hundred four million, eight hundred eighty-one thousand, one hundred thirty-nine".