10209138 has 8 divisors (see below), whose sum is σ = 20418288. Its totient is φ = 3403044.

The previous prime is 10209127. The next prime is 10209169. The reversal of 10209138 is 83190201.

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

10209138 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850756 + ... + 850767.

It is an arithmetic number, because the mean of its divisors is an integer number (2552286).

Almost surely, 2^10209138 is an apocalyptic number.

10209138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

10209138 is a wasteful number, since it uses less digits than its factorization.

10209138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701528.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 10209138 is about 3195.1741736563. The cubic root of 10209138 is about 216.9350326160.

Adding to 10209138 its reverse (83190201), we get a palindrome (93399339).

The spelling of 10209138 in words is "ten million, two hundred nine thousand, one hundred thirty-eight".