100440342 has 12 divisors (see below), whose sum is σ = 217620780. Its totient is φ = 33480108.

The previous prime is 100440337. The next prime is 100440349. The reversal of 100440342 is 243044001.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 5580019 = 100440342 / (1 + 0 + 0 + 4 + 4 + 0 + 3 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100440349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2789992 + ... + 2790027.

It is an arithmetic number, because the mean of its divisors is an integer number (18135065).

Almost surely, 2^100440342 is an apocalyptic number.

100440342 is an abundant number, since it is smaller than the sum of its proper divisors (117180438).

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

100440342 is a wasteful number, since it uses less digits than its factorization.

100440342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5580027 (or 5580024 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 100440342 is about 10021.9929155832. The cubic root of 100440342 is about 464.8391812938.

Adding to 100440342 its reverse (243044001), we get a palindrome (343484343).

The spelling of 100440342 in words is "one hundred million, four hundred forty thousand, three hundred forty-two".