100644948 has 18 divisors (see below), whose sum is σ = 254408154. Its totient is φ = 33548304.

The previous prime is 100644923. The next prime is 100644977. The reversal of 100644948 is 849446001.

It is a happy number.

100644948 is a `hidden beast` number, since 1 + 0 + 0 + 644 + 9 + 4 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 68359824 + 32285124 = 8268^2 + 5682^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2795693 = 100644948 / (1 + 0 + 0 + 6 + 4 + 4 + 9 + 4 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1397811 + ... + 1397882.

Almost surely, 2^100644948 is an apocalyptic number.

100644948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

100644948 is an abundant number, since it is smaller than the sum of its proper divisors (153763206).

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

100644948 is a wasteful number, since it uses less digits than its factorization.

100644948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795703 (or 2795698 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 100644948 is about 10032.1955722564. The cubic root of 100644948 is about 465.1546069314.

It can be divided in two parts, 1006 and 44948, that added together give a palindrome (45954).

The spelling of 100644948 in words is "one hundred million, six hundred forty-four thousand, nine hundred forty-eight".