2002581378 has 24 divisors (see below), whose sum is σ = 4958773248. Its totient is φ = 572166072.

The previous prime is 2002581313. The next prime is 2002581389. The reversal of 2002581378 is 8731852002.

2002581378 is a `hidden beast` number, since 2 + 0 + 0 + 2 + 581 + 3 + 78 = 666.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7946626 + ... + 7946877.

It is an arithmetic number, because the mean of its divisors is an integer number (206615552).

Almost surely, 2^2002581378 is an apocalyptic number.

2002581378 is an abundant number, since it is smaller than the sum of its proper divisors (2956191870).

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

2002581378 is a wasteful number, since it uses less digits than its factorization.

2002581378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15893518 (or 15893515 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 2002581378 is about 44750.2109268772. The cubic root of 2002581378 is about 1260.4628722670.

The spelling of 2002581378 in words is "two billion, two million, five hundred eighty-one thousand, three hundred seventy-eight".