3878928 has 100 divisors (see below), whose sum is σ = 11658108. Its totient is φ = 1244160.

The previous prime is 3878923. The next prime is 3878947. The reversal of 3878928 is 8298783.

It can be written as a sum of positive squares in 2 ways, for example, as 1016064 + 2862864 = 1008^2 + 1692^2 .

It is not an unprimeable number, because it can be changed into a prime (3878921) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53100 + ... + 53172.

Almost surely, 2^3878928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3878928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5829054).

3878928 is an abundant number, since it is smaller than the sum of its proper divisors (7779180).

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

3878928 is a wasteful number, since it uses less digits than its factorization.

3878928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 119 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 3878928 is about 1969.4994287889. The cubic root of 3878928 is about 157.1220871408.

The spelling of 3878928 in words is "three million, eight hundred seventy-eight thousand, nine hundred twenty-eight".