3698690 has 16 divisors (see below), whose sum is σ = 7049592. Its totient is φ = 1392384.

The previous prime is 3698683. The next prime is 3698693. The reversal of 3698690 is 968963.

It can be written as a sum of positive squares in 4 ways, for example, as 3682561 + 16129 = 1919^2 + 127^2 .

It is a super-2 number, since 2×3698690² = 27360615432200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3698693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10709 + ... + 11048.

Almost surely, 2^3698690 is an apocalyptic number.

3698690 is a deficient number, since it is larger than the sum of its proper divisors (3350902).

3698690 is a wasteful number, since it uses less digits than its factorization.

3698690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21781.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 3698690 is about 1923.1978577359. The cubic root of 3698690 is about 154.6497816073.

The spelling of 3698690 in words is "three million, six hundred ninety-eight thousand, six hundred ninety".