3870705 has 16 divisors (see below), whose sum is σ = 6269760. Its totient is φ = 2038848.

The previous prime is 3870703. The next prime is 3870709. The reversal of 3870705 is 5070783.

It is not a de Polignac number, because 3870705 - 2¹ = 3870703 is a prime.

It is an alternating number because its digits alternate between odd and even.

3870705 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3870703) 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, 310 + ... + 2799.

It is an arithmetic number, because the mean of its divisors is an integer number (391860).

Almost surely, 2^3870705 is an apocalyptic number.

It is an amenable number.

3870705 is a deficient number, since it is larger than the sum of its proper divisors (2399055).

3870705 is a wasteful number, since it uses less digits than its factorization.

3870705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 3870705 is about 1967.4107349509. The cubic root of 3870705 is about 157.0109800697.

The spelling of 3870705 in words is "three million, eight hundred seventy thousand, seven hundred five".