3658642 has 8 divisors (see below), whose sum is σ = 5910156. Its totient is φ = 1688592.

The previous prime is 3658639. The next prime is 3658661. The reversal of 3658642 is 2468563.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3606201 + 52441 = 1899^2 + 229^2 .

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

It is a super-2 number, since 2×3658642² = 26771322568328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3658598 and 3658607.

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 3 ways as a sum of consecutive naturals, for example, 70333 + ... + 70384.

Almost surely, 2^3658642 is an apocalyptic number.

3658642 is a deficient number, since it is larger than the sum of its proper divisors (2251514).

3658642 is a wasteful number, since it uses less digits than its factorization.

3658642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140732.

The product of its digits is 34560, while the sum is 34.

The square root of 3658642 is about 1912.7576950571. The cubic root of 3658642 is about 154.0895919904.

It can be divided in two parts, 36 and 58642, that multiplied together give a palindrome (2111112).

The spelling of 3658642 in words is "three million, six hundred fifty-eight thousand, six hundred forty-two".