3890378085 has 24 divisors (see below), whose sum is σ = 6841924320. Its totient is φ = 1886243040.

The previous prime is 3890378081. The next prime is 3890378137. The reversal of 3890378085 is 5808730983.

It is a happy number.

It is not a de Polignac number, because 3890378085 - 2² = 3890378081 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3890378081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1069915 + ... + 1073544.

It is an arithmetic number, because the mean of its divisors is an integer number (285080180).

Almost surely, 2^3890378085 is an apocalyptic number.

It is an amenable number.

3890378085 is a deficient number, since it is larger than the sum of its proper divisors (2951546235).

3890378085 is a wasteful number, since it uses less digits than its factorization.

3890378085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143489 (or 2143478 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 3890378085 is about 62372.8954354373. The cubic root of 3890378085 is about 1572.7653651037.

The spelling of 3890378085 in words is "three billion, eight hundred ninety million, three hundred seventy-eight thousand, eighty-five".