3690645 has 16 divisors (see below), whose sum is σ = 6748800. Its totient is φ = 1687104.

The previous prime is 3690629. The next prime is 3690671. The reversal of 3690645 is 5460963.

3690645 = 603² + 604² + ... + 612².

It is a happy number.

It is not a de Polignac number, because 3690645 - 2⁴ = 3690629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17470 + ... + 17679.

It is an arithmetic number, because the mean of its divisors is an integer number (421800).

Almost surely, 2^3690645 is an apocalyptic number.

3690645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3690645 is a deficient number, since it is larger than the sum of its proper divisors (3058155).

3690645 is a wasteful number, since it uses less digits than its factorization.

3690645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35164.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 3690645 is about 1921.1051506880. The cubic root of 3690645 is about 154.5375742548.

The spelling of 3690645 in words is "three million, six hundred ninety thousand, six hundred forty-five".