100440252 has 36 divisors (see below), whose sum is σ = 276972696. Its totient is φ = 30436320.

The previous prime is 100440239. The next prime is 100440323. The reversal of 100440252 is 252044001.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126423 + ... + 127214.

It is an arithmetic number, because the mean of its divisors is an integer number (7693686).

Almost surely, 2^100440252 is an apocalyptic number.

100440252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100440252 is an abundant number, since it is smaller than the sum of its proper divisors (176532444).

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

100440252 is a wasteful number, since it uses less digits than its factorization.

100440252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253658 (or 253653 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 100440252 is about 10021.9884254573. The cubic root of 100440252 is about 464.8390424534.

Adding to 100440252 its reverse (252044001), we get a palindrome (352484253).

The spelling of 100440252 in words is "one hundred million, four hundred forty thousand, two hundred fifty-two".