3927645 has 12 divisors (see below), whose sum is σ = 6807996. Its totient is φ = 2094720.

The previous prime is 3927611. The next prime is 3927647. The reversal of 3927645 is 5467293.

3927645 is a `hidden beast` number, since 3 + 9 + 2 + 7 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2965284 + 962361 = 1722^2 + 981^2 .

It is not a de Polignac number, because 3927645 - 2¹⁰ = 3926621 is a prime.

3927645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3927647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43596 + ... + 43685.

It is an arithmetic number, because the mean of its divisors is an integer number (567333).

Almost surely, 2^3927645 is an apocalyptic number.

It is an amenable number.

3927645 is a deficient number, since it is larger than the sum of its proper divisors (2880351).

3927645 is a wasteful number, since it uses less digits than its factorization.

3927645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87292 (or 87289 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 3927645 is about 1981.8287009729. The cubic root of 3927645 is about 157.7771386640. Note that the first 3 decimals are identical.

The spelling of 3927645 in words is "three million, nine hundred twenty-seven thousand, six hundred forty-five".