1039805040 has 40 divisors (see below), whose sum is σ = 3223396368. Its totient is φ = 277281280.

The previous prime is 1039805029. The next prime is 1039805089. The reversal of 1039805040 is 405089301.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1039804989 and 1039805007.

It is a congruent number.

It is an unprimeable number.

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, 2166021 + ... + 2166500.

Almost surely, 2^1039805040 is an apocalyptic number.

1039805040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1039805040 is an abundant number, since it is smaller than the sum of its proper divisors (2183591328).

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

1039805040 is a wasteful number, since it uses less digits than its factorization.

1039805040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332537 (or 4332531 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1039805040 is about 32246.0081250377. The cubic root of 1039805040 is about 1013.0960903902.

The spelling of 1039805040 in words is "one billion, thirty-nine million, eight hundred five thousand, forty".