3979780 has 72 divisors (see below), whose sum is σ = 10112256. Its totient is φ = 1310400.

The previous prime is 3979771. The next prime is 3979837. The reversal of 3979780 is 879793.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30315 + ... + 30445.

It is an arithmetic number, because the mean of its divisors is an integer number (140448).

Almost surely, 2^3979780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3979780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5056128).

3979780 is an abundant number, since it is smaller than the sum of its proper divisors (6132476).

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

3979780 is a wasteful number, since it uses less digits than its factorization.

3979780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 3979780 is about 1994.9385955462. The cubic root of 3979780 is about 158.4721761507.

The spelling of 3979780 in words is "three million, nine hundred seventy-nine thousand, seven hundred eighty".