100840312 has 8 divisors (see below), whose sum is σ = 189075600. Its totient is φ = 50420152.

The previous prime is 100840307. The next prime is 100840321. The reversal of 100840312 is 213048001.

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

It is a self number, because there is not a number n which added to its sum of digits gives 100840312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6302512 + ... + 6302527.

It is an arithmetic number, because the mean of its divisors is an integer number (23634450).

Almost surely, 2^100840312 is an apocalyptic number.

It is an amenable number.

100840312 is a deficient number, since it is larger than the sum of its proper divisors (88235288).

100840312 is a wasteful number, since it uses less digits than its factorization.

100840312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12605045 (or 12605041 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 100840312 is about 10041.9277033844. The cubic root of 100840312 is about 465.4553861568.

Adding to 100840312 its reverse (213048001), we get a palindrome (313888313).

The spelling of 100840312 in words is "one hundred million, eight hundred forty thousand, three hundred twelve".