3990856055 has 8 divisors (see below), whose sum is σ = 4791308544. Its totient is φ = 3191164000.

The previous prime is 3990856033. The next prime is 3990856061. The reversal of 3990856055 is 5506580993.

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

It is not a de Polignac number, because 3990856055 - 2¹² = 3990851959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3990855994 and 3990856012.

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, 178496 + ... + 199605.

It is an arithmetic number, because the mean of its divisors is an integer number (598913568).

Almost surely, 2^3990856055 is an apocalyptic number.

3990856055 is a deficient number, since it is larger than the sum of its proper divisors (800452489).

3990856055 is a wasteful number, since it uses less digits than its factorization.

3990856055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380217.

The product of its (nonzero) digits is 1458000, while the sum is 50.

The square root of 3990856055 is about 63173.2226105333. Note that the first 3 decimals coincide. The cubic root of 3990856055 is about 1586.1905367660.

The spelling of 3990856055 in words is "three billion, nine hundred ninety million, eight hundred fifty-six thousand, fifty-five".