100120440 has 64 divisors (see below), whose sum is σ = 343272960. Its totient is φ = 22884480.

The previous prime is 100120417. The next prime is 100120457. The reversal of 100120440 is 44021001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58756 + ... + 60435.

It is an arithmetic number, because the mean of its divisors is an integer number (5363640).

Almost surely, 2^100120440 is an apocalyptic number.

100120440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100120440 is an abundant number, since it is smaller than the sum of its proper divisors (243152520).

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

100120440 is a wasteful number, since it uses less digits than its factorization.

100120440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119212 (or 119208 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 100120440 is about 10006.0201878669. The cubic root of 100120440 is about 464.3451529200.

Adding to 100120440 its reverse (44021001), we get a palindrome (144141441).

The spelling of 100120440 in words is "one hundred million, one hundred twenty thousand, four hundred forty".