3638398 has 8 divisors (see below), whose sum is σ = 5645880. Its totient is φ = 1756440.

The previous prime is 3638351. The next prime is 3638407. The reversal of 3638398 is 8938363.

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

It is a super-3 number, since 3×3638398³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3638398.

It is a congruent number.

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, 31308 + ... + 31423.

It is an arithmetic number, because the mean of its divisors is an integer number (705735).

Almost surely, 2^3638398 is an apocalyptic number.

3638398 is a deficient number, since it is larger than the sum of its proper divisors (2007482).

3638398 is a wasteful number, since it uses less digits than its factorization.

3638398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62762.

The product of its digits is 93312, while the sum is 40.

The square root of 3638398 is about 1907.4585185529. The cubic root of 3638398 is about 153.8048633165.

It can be divided in two parts, 36383 and 98, that added together give a square (36481 = 191²).

The spelling of 3638398 in words is "three million, six hundred thirty-eight thousand, three hundred ninety-eight".