3878405028 has 72 divisors (see below), whose sum is σ = 9955545600. Its totient is φ = 1272848256.

The previous prime is 3878404979. The next prime is 3878405051. The reversal of 3878405028 is 8205048783.

3878405028 is a `hidden beast` number, since 38 + 78 + 40 + 502 + 8 = 666.

It is a super-2 number, since 2×3878405028² = 30084051122431361568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2204013 + ... + 2205771.

Almost surely, 2^3878405028 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 3878405028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4977772800).

3878405028 is an abundant number, since it is smaller than the sum of its proper divisors (6077140572).

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

3878405028 is a wasteful number, since it uses less digits than its factorization.

3878405028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681 (or 2676 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 3878405028 is about 62276.8418274402. The cubic root of 3878405028 is about 1571.1502555525.

The spelling of 3878405028 in words is "three billion, eight hundred seventy-eight million, four hundred five thousand, twenty-eight".