3878658 has 64 divisors (see below), whose sum is σ = 10199040. Its totient is φ = 1069200.

The previous prime is 3878657. The next prime is 3878681. The reversal of 3878658 is 8568783.

3878658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3878653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11553 + ... + 11883.

It is an arithmetic number, because the mean of its divisors is an integer number (159360).

Almost surely, 2^3878658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3878658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5099520).

3878658 is an abundant number, since it is smaller than the sum of its proper divisors (6320382).

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

3878658 is a wasteful number, since it uses less digits than its factorization.

3878658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 374 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 3878658 is about 1969.4308822602. The cubic root of 3878658 is about 157.1184414644.

It can be divided in two parts, 387 and 8658, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 3878658 in words is "three million, eight hundred seventy-eight thousand, six hundred fifty-eight".