3638629 has 8 divisors (see below), whose sum is σ = 3876120. Its totient is φ = 3403776.

The previous prime is 3638573. The next prime is 3638639. The reversal of 3638629 is 9268363.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21025 + 3617604 = 145^2 + 1902^2 .

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 3638629 - 2¹³ = 3630437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3638639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2727 + ... + 3835.

It is an arithmetic number, because the mean of its divisors is an integer number (484515).

Almost surely, 2^3638629 is an apocalyptic number.

It is an amenable number.

3638629 is a deficient number, since it is larger than the sum of its proper divisors (237491).

3638629 is a wasteful number, since it uses less digits than its factorization.

3638629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319.

The product of its digits is 46656, while the sum is 37.

The square root of 3638629 is about 1907.5190693673. The cubic root of 3638629 is about 153.8081182446.

The spelling of 3638629 in words is "three million, six hundred thirty-eight thousand, six hundred twenty-nine".