3978250 has 16 divisors (see below), whose sum is σ = 7447752. Its totient is φ = 1591200.

The previous prime is 3978229. The next prime is 3978253. The reversal of 3978250 is 528793.

It can be written as a sum of positive squares in 4 ways, for example, as 1814409 + 2163841 = 1347^2 + 1471^2 .

It is not an unprimeable number, because it can be changed into a prime (3978253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7707 + ... + 8206.

Almost surely, 2^3978250 is an apocalyptic number.

3978250 is a deficient number, since it is larger than the sum of its proper divisors (3469502).

3978250 is a wasteful number, since it uses less digits than its factorization.

3978250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15930 (or 15920 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 3978250 is about 1994.5550882340. Note that the first 3 decimals coincide. The cubic root of 3978250 is about 158.4518656890.

The spelling of 3978250 in words is "three million, nine hundred seventy-eight thousand, two hundred fifty".