100402544 has 80 divisors (see below), whose sum is σ = 234627840. Its totient is φ = 41057280.

The previous prime is 100402543. The next prime is 100402579. The reversal of 100402544 is 445204001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100402541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68087 + ... + 69545.

It is an arithmetic number, because the mean of its divisors is an integer number (2932848).

Almost surely, 2^100402544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100402544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117313920).

100402544 is an abundant number, since it is smaller than the sum of its proper divisors (134225296).

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

100402544 is a wasteful number, since it uses less digits than its factorization.

100402544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518 (or 1512 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 100402544 is about 10020.1069854568. The cubic root of 100402544 is about 464.7808641028.

Adding to 100402544 its reverse (445204001), we get a palindrome (545606545).

The spelling of 100402544 in words is "one hundred million, four hundred two thousand, five hundred forty-four".