100840408 has 8 divisors (see below), whose sum is σ = 189075780. Its totient is φ = 50420200.

The previous prime is 100840403. The next prime is 100840417. The reversal of 100840408 is 804048001.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100840403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6302518 + ... + 6302533.

Almost surely, 2^100840408 is an apocalyptic number.

It is an amenable number.

100840408 is a deficient number, since it is larger than the sum of its proper divisors (88235372).

100840408 is a wasteful number, since it uses less digits than its factorization.

100840408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12605057 (or 12605053 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 100840408 is about 10041.9324833420. The cubic root of 100840408 is about 465.4555338613.

Adding to 100840408 its reverse (804048001), we get a palindrome (904888409).

The spelling of 100840408 in words is "one hundred million, eight hundred forty thousand, four hundred eight".