1439889090 has 16 divisors (see below), whose sum is σ = 3455733888. Its totient is φ = 383970416.

The previous prime is 1439889083. The next prime is 1439889091. The reversal of 1439889090 is 909889341.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1439889091) 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, 23998122 + ... + 23998181.

It is an arithmetic number, because the mean of its divisors is an integer number (215983368).

Almost surely, 2^1439889090 is an apocalyptic number.

1439889090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1439889090 is an abundant number, since it is smaller than the sum of its proper divisors (2015844798).

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

1439889090 is a wasteful number, since it uses less digits than its factorization.

1439889090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47996313.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 1439889090 is about 37945.8705263168. The cubic root of 1439889090 is about 1129.2142421612.

The spelling of 1439889090 in words is "one billion, four hundred thirty-nine million, eight hundred eighty-nine thousand, ninety".