3630981 has 8 divisors (see below), whose sum is σ = 4874400. Its totient is φ = 2404112.

The previous prime is 3630973. The next prime is 3630983. The reversal of 3630981 is 1890363.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3630981 - 2³ = 3630973 is a prime.

It is a super-2 number, since 2×3630981² = 26368046044722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3630983) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3615 + ... + 4508.

It is an arithmetic number, because the mean of its divisors is an integer number (609300).

Almost surely, 2^3630981 is an apocalyptic number.

It is an amenable number.

3630981 is a deficient number, since it is larger than the sum of its proper divisors (1243419).

3630981 is a wasteful number, since it uses less digits than its factorization.

3630981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8275.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 3630981 is about 1905.5133166682. The cubic root of 3630981 is about 153.7002800432.

The spelling of 3630981 in words is "three million, six hundred thirty thousand, nine hundred eighty-one".