3979280 has 20 divisors (see below), whose sum is σ = 9252012. Its totient is φ = 1591680.

The previous prime is 3979267. The next prime is 3979289. The reversal of 3979280 is 829793.

It can be written as a sum of positive squares in 2 ways, for example, as 2715904 + 1263376 = 1648^2 + 1124^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (3979289) 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, 24791 + ... + 24950.

Almost surely, 2^3979280 is an apocalyptic number.

It is an amenable number.

3979280 is an abundant number, since it is smaller than the sum of its proper divisors (5272732).

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

3979280 is a wasteful number, since it uses less digits than its factorization.

3979280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49754 (or 49748 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 3979280 is about 1994.8132744696. The cubic root of 3979280 is about 158.4655393176.

The spelling of 3979280 in words is "three million, nine hundred seventy-nine thousand, two hundred eighty".