3924280 has 64 divisors (see below), whose sum is σ = 9720000. Its totient is φ = 1419264.

The previous prime is 3924253. The next prime is 3924281. The reversal of 3924280 is 824293.

3924280 = T₁₆₉ + T₁₇₀ + ... + T₃₀₄.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3924281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19621 + ... + 19819.

It is an arithmetic number, because the mean of its divisors is an integer number (151875).

Almost surely, 2^3924280 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 3924280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4860000).

3924280 is an abundant number, since it is smaller than the sum of its proper divisors (5795720).

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

3924280 is a wasteful number, since it uses less digits than its factorization.

3924280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 3924280 is about 1980.9795556744. The cubic root of 3924280 is about 157.7320674008.

The spelling of 3924280 in words is "three million, nine hundred twenty-four thousand, two hundred eighty".