3878550 has 144 divisors (see below), whose sum is σ = 12253680. Its totient is φ = 898560.

The previous prime is 3878549. The next prime is 3878561. The reversal of 3878550 is 558783.

It is a happy number.

3878550 is a `hidden beast` number, since 38 + 78 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 228142 + ... + 228158.

It is an arithmetic number, because the mean of its divisors is an integer number (85095).

Almost surely, 2^3878550 is an apocalyptic number.

3878550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3878550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6126840).

3878550 is an abundant number, since it is smaller than the sum of its proper divisors (8375130).

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

3878550 is a wasteful number, since it uses less digits than its factorization.

3878550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 3878550 is about 1969.4034629806. The cubic root of 3878550 is about 157.1169831465.

The spelling of 3878550 in words is "three million, eight hundred seventy-eight thousand, five hundred fifty".