3906556 has 6 divisors (see below), whose sum is σ = 6836480. Its totient is φ = 1953276.

The previous prime is 3906547. The next prime is 3906557. The reversal of 3906556 is 6556093.

It is a super-2 number, since 2×3906556² = 30522359562272, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3 + 9² + 0 + 6 + 5⁹ + 5⁹ + 6³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3906557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488316 + ... + 488323.

Almost surely, 2^3906556 is an apocalyptic number.

It is an amenable number.

3906556 is a deficient number, since it is larger than the sum of its proper divisors (2929924).

3906556 is a wasteful number, since it uses less digits than its factorization.

3906556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976643 (or 976641 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 3906556 is about 1976.5009486464. The cubic root of 3906556 is about 157.4942435118.

The spelling of 3906556 in words is "three million, nine hundred six thousand, five hundred fifty-six".