100840438 has 8 divisors (see below), whose sum is σ = 152674632. Its totient is φ = 49948896.

The previous prime is 100840433. The next prime is 100840477. The reversal of 100840438 is 834048001.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100840433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235395 + ... + 235822.

It is an arithmetic number, because the mean of its divisors is an integer number (19084329).

Almost surely, 2^100840438 is an apocalyptic number.

100840438 is a deficient number, since it is larger than the sum of its proper divisors (51834194).

100840438 is a wasteful number, since it uses less digits than its factorization.

100840438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471326.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 100840438 is about 10041.9339770783. The cubic root of 100840438 is about 465.4555800190.

Adding to 100840438 its reverse (834048001), we get a palindrome (934888439).

The spelling of 100840438 in words is "one hundred million, eight hundred forty thousand, four hundred thirty-eight".