3659640 has 32 divisors (see below), whose sum is σ = 10979280. Its totient is φ = 975872.

The previous prime is 3659629. The next prime is 3659651. The reversal of 3659640 is 469563.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3659629) and next prime (3659651).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15129 + ... + 15368.

Almost surely, 2^3659640 is an apocalyptic number.

3659640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3659640 is an abundant number, since it is smaller than the sum of its proper divisors (7319640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3659640 is a wasteful number, since it uses less digits than its factorization.

3659640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30511 (or 30507 counting only the distinct ones).

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

The square root of 3659640 is about 1913.0185571499. The cubic root of 3659640 is about 154.1036015084.

The spelling of 3659640 in words is "three million, six hundred fifty-nine thousand, six hundred forty".