3900556 has 18 divisors (see below), whose sum is σ = 7503860. Its totient is φ = 1772760.

The previous prime is 3900517. The next prime is 3900563. The reversal of 3900556 is 6550093.

3900556 = T₁₉₁ + T₁₉₂ + ... + T₃₁₁.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3546 + ... + 4513.

Almost surely, 2^3900556 is an apocalyptic number.

It is an amenable number.

3900556 is a deficient number, since it is larger than the sum of its proper divisors (3603304).

3900556 is a wasteful number, since it uses less digits than its factorization.

3900556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8085 (or 8072 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 3900556 is about 1974.9825315683. The cubic root of 3900556 is about 157.4135714604.

The spelling of 3900556 in words is "three million, nine hundred thousand, five hundred fifty-six".