3856140890 has 64 divisors (see below), whose sum is σ = 8095887360. Its totient is φ = 1295161920.

The previous prime is 3856140859. The next prime is 3856140929. The reversal of 3856140890 is 980416583.

Together with 4239746469 it forms a betrothed pair.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 721769 + ... + 727091.

It is an arithmetic number, because the mean of its divisors is an integer number (126498240).

Almost surely, 2^3856140890 is an apocalyptic number.

3856140890 is an abundant number, since it is smaller than the sum of its proper divisors (4239746470).

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

3856140890 is a wasteful number, since it uses less digits than its factorization.

3856140890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5547.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 3856140890 is about 62097.8332150164. The cubic root of 3856140890 is about 1568.1380675162.

The spelling of 3856140890 in words is "three billion, eight hundred fifty-six million, one hundred forty thousand, eight hundred ninety".