3912280 has 32 divisors (see below), whose sum is σ = 8994240. Its totient is φ = 1530880.

The previous prime is 3912263. The next prime is 3912319. The reversal of 3912280 is 822193.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840 + ... + 2920.

It is an arithmetic number, because the mean of its divisors is an integer number (281070).

Almost surely, 2^3912280 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 3912280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4497120).

3912280 is an abundant number, since it is smaller than the sum of its proper divisors (5081960).

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

3912280 is a wasteful number, since it uses less digits than its factorization.

3912280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139 (or 2135 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 3912280 is about 1977.9484320882. The cubic root of 3912280 is about 157.5711276955.

The spelling of 3912280 in words is "three million, nine hundred twelve thousand, two hundred eighty".