3978512 has 10 divisors (see below), whose sum is σ = 7708398. Its totient is φ = 1989248.

The previous prime is 3978511. The next prime is 3978523. The reversal of 3978512 is 2158793.

It can be written as a sum of positive squares in only one way, i.e., 2085136 + 1893376 = 1444^2 + 1376^2 .

It is not an unprimeable number, because it can be changed into a prime (3978511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124313 + ... + 124344.

Almost surely, 2^3978512 is an apocalyptic number.

It is an amenable number.

3978512 is a deficient number, since it is larger than the sum of its proper divisors (3729886).

3978512 is a wasteful number, since it uses less digits than its factorization.

3978512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248665 (or 248659 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 3978512 is about 1994.6207659603. The cubic root of 3978512 is about 158.4553440591.

The spelling of 3978512 in words is "three million, nine hundred seventy-eight thousand, five hundred twelve".