3978580 has 12 divisors (see below), whose sum is σ = 8355060. Its totient is φ = 1591424.

The previous prime is 3978553. The next prime is 3978587. The reversal of 3978580 is 858793.

It can be written as a sum of positive squares in 2 ways, for example, as 2604996 + 1373584 = 1614^2 + 1172^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99445 + ... + 99484.

It is an arithmetic number, because the mean of its divisors is an integer number (696255).

Almost surely, 2^3978580 is an apocalyptic number.

It is an amenable number.

3978580 is an abundant number, since it is smaller than the sum of its proper divisors (4376480).

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

3978580 is a wasteful number, since it uses less digits than its factorization.

3978580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198938 (or 198936 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 3978580 is about 1994.6378117343. The cubic root of 3978580 is about 158.4562468173.

The spelling of 3978580 in words is "three million, nine hundred seventy-eight thousand, five hundred eighty".