1439890040 has 16 divisors (see below), whose sum is σ = 3239752680. Its totient is φ = 575956000.

The previous prime is 1439890013. The next prime is 1439890057. The reversal of 1439890040 is 400989341.

It is a junction number, because it is equal to n+sod(n) for n = 1439889976 and 1439890003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17998586 + ... + 17998665.

Almost surely, 2^1439890040 is an apocalyptic number.

1439890040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1439890040 is an abundant number, since it is smaller than the sum of its proper divisors (1799862640).

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

1439890040 is a wasteful number, since it uses less digits than its factorization.

1439890040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35997262 (or 35997258 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1439890040 is about 37945.8830441459. The cubic root of 1439890040 is about 1129.2144905029.

The spelling of 1439890040 in words is "one billion, four hundred thirty-nine million, eight hundred ninety thousand, forty".