3945284 has 18 divisors (see below), whose sum is σ = 8031870. Its totient is φ = 1690752.

The previous prime is 3945233. The next prime is 3945287. The reversal of 3945284 is 4825493.

It can be written as a sum of positive squares in only one way, i.e., 3841600 + 103684 = 1960^2 + 322^2 .

It is not an unprimeable number, because it can be changed into a prime (3945287) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9869 + ... + 10260.

It is an arithmetic number, because the mean of its divisors is an integer number (446215).

Almost surely, 2^3945284 is an apocalyptic number.

It is an amenable number.

3945284 is an abundant number, since it is smaller than the sum of its proper divisors (4086586).

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

3945284 is a wasteful number, since it uses less digits than its factorization.

3945284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20147 (or 20138 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 3945284 is about 1986.2738985346. The cubic root of 3945284 is about 158.0129776233.

The spelling of 3945284 in words is "three million, nine hundred forty-five thousand, two hundred eighty-four".