1885139494 has 16 divisors (see below), whose sum is σ = 3232608768. Its totient is φ = 807681672.

The previous prime is 1885139489. The next prime is 1885139561. The reversal of 1885139494 is 4949315881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35539 + ... + 70945.

It is an arithmetic number, because the mean of its divisors is an integer number (202038048).

Almost surely, 2^1885139494 is an apocalyptic number.

1885139494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1885139494 is a deficient number, since it is larger than the sum of its proper divisors (1347469274).

1885139494 is a wasteful number, since it uses less digits than its factorization.

1885139494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39219.

The product of its digits is 1244160, while the sum is 52.

The square root of 1885139494 is about 43418.1931222385. The cubic root of 1885139494 is about 1235.3248106740.

The spelling of 1885139494 in words is "one billion, eight hundred eighty-five million, one hundred thirty-nine thousand, four hundred ninety-four".