3930645 has 32 divisors (see below), whose sum is σ = 6635520. Its totient is φ = 1984320.

The previous prime is 3930637. The next prime is 3930653. The reversal of 3930645 is 5460393.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3930637) and next prime (3930653).

It is not a de Polignac number, because 3930645 - 2³ = 3930637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36682 + ... + 36788.

It is an arithmetic number, because the mean of its divisors is an integer number (207360).

Almost surely, 2^3930645 is an apocalyptic number.

It is an amenable number.

3930645 is a deficient number, since it is larger than the sum of its proper divisors (2704875).

3930645 is a wasteful number, since it uses less digits than its factorization.

3930645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 3930645 is about 1982.5854332159. The cubic root of 3930645 is about 157.8172993672.

The spelling of 3930645 in words is "three million, nine hundred thirty thousand, six hundred forty-five".