3902644 has 6 divisors (see below), whose sum is σ = 6829634. Its totient is φ = 1951320.

The previous prime is 3902641. The next prime is 3902651. The reversal of 3902644 is 4462093.

It can be written as a sum of positive squares in only one way, i.e., 3467044 + 435600 = 1862^2 + 660^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3902641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487827 + ... + 487834.

Almost surely, 2^3902644 is an apocalyptic number.

It is an amenable number.

3902644 is a deficient number, since it is larger than the sum of its proper divisors (2926990).

3902644 is a wasteful number, since it uses less digits than its factorization.

3902644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975665 (or 975663 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 3902644 is about 1975.5110731150. The cubic root of 3902644 is about 157.4416547137.

The spelling of 3902644 in words is "three million, nine hundred two thousand, six hundred forty-four".