3700645 has 24 divisors (see below), whose sum is σ = 5106024. Its totient is φ = 2558976.

The previous prime is 3700607. The next prime is 3700691. The reversal of 3700645 is 5460073.

It can be written as a sum of positive squares in 12 ways, for example, as 6561 + 3694084 = 81^2 + 1922^2 .

It is not a de Polignac number, because 3700645 - 2⁷ = 3700517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18687 + ... + 18883.

It is an arithmetic number, because the mean of its divisors is an integer number (212751).

Almost surely, 2^3700645 is an apocalyptic number.

It is an amenable number.

3700645 is a deficient number, since it is larger than the sum of its proper divisors (1405379).

3700645 is a wasteful number, since it uses less digits than its factorization.

3700645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 3700645 is about 1923.7060586275. The cubic root of 3700645 is about 154.6770243220.

The spelling of 3700645 in words is "three million, seven hundred thousand, six hundred forty-five".