100403240 has 64 divisors (see below), whose sum is σ = 259234560. Its totient is φ = 34283520.

The previous prime is 100403231. The next prime is 100403243. The reversal of 100403240 is 42304001.

It is a super-3 number, since 3×100403240³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (100403243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86504 + ... + 87656.

It is an arithmetic number, because the mean of its divisors is an integer number (4050540).

Almost surely, 2^100403240 is an apocalyptic number.

100403240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100403240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129617280).

100403240 is an abundant number, since it is smaller than the sum of its proper divisors (158831320).

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

100403240 is a wasteful number, since it uses less digits than its factorization.

100403240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482 (or 1478 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 100403240 is about 10020.1417155647. The cubic root of 100403240 is about 464.7819380687.

Adding to 100403240 its reverse (42304001), we get a palindrome (142707241).

The spelling of 100403240 in words is "one hundred million, four hundred three thousand, two hundred forty".