3878091 has 48 divisors (see below), whose sum is σ = 7073280. Its totient is φ = 2056320.

The previous prime is 3878051. The next prime is 3878093. The reversal of 3878091 is 1908783.

3878091 = 51³ + 52³ + ... + 68³.

It is not a de Polignac number, because 3878091 - 2¹⁷ = 3747019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3878093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54586 + ... + 54656.

It is an arithmetic number, because the mean of its divisors is an integer number (147360).

Almost surely, 2^3878091 is an apocalyptic number.

3878091 is a deficient number, since it is larger than the sum of its proper divisors (3195189).

3878091 is a wasteful number, since it uses less digits than its factorization.

3878091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 3878091 is about 1969.2869267834. The cubic root of 3878091 is about 157.1107849934.

The spelling of 3878091 in words is "three million, eight hundred seventy-eight thousand, ninety-one".