3978538425 has 24 divisors (see below), whose sum is σ = 7308723680. Its totient is φ = 2121886800.

The previous prime is 3978538409. The next prime is 3978538433. The reversal of 3978538425 is 5248358793.

3978538425 is a `hidden beast` number, since 39 + 78 + 538 + 4 + 2 + 5 = 666.

It is not a de Polignac number, because 3978538425 - 2⁴ = 3978538409 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2946391 + ... + 2947740.

Almost surely, 2^3978538425 is an apocalyptic number.

It is an amenable number.

3978538425 is a deficient number, since it is larger than the sum of its proper divisors (3330185255).

3978538425 is a wasteful number, since it uses less digits than its factorization.

3978538425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5894150 (or 5894139 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The square root of 3978538425 is about 63075.6563580594. The cubic root of 3978538425 is about 1584.5569487482.

It can be divided in two parts, 39785 and 38425, that added together give a triangular number (78210 = T₃₉₅).

The spelling of 3978538425 in words is "three billion, nine hundred seventy-eight million, five hundred thirty-eight thousand, four hundred twenty-five".