1000404100 has 144 divisors (see below), whose sum is σ = 2435844096. Its totient is φ = 354816000.

The previous prime is 1000404089. The next prime is 1000404107. The reversal of 1000404100 is 14040001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1000404107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2160469 + ... + 2160931.

It is an arithmetic number, because the mean of its divisors is an integer number (16915584).

Almost surely, 2^1000404100 is an apocalyptic number.

1000404100 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 1000404100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217922048).

1000404100 is an abundant number, since it is smaller than the sum of its proper divisors (1435439996).

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

1000404100 is a wasteful number, since it uses less digits than its factorization.

1000404100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1000404100 is about 31629.1653383392. The cubic root of 1000404100 is about 1000.1346818600.

Adding to 1000404100 its reverse (14040001), we get a palindrome (1014444101).

The spelling of 1000404100 in words is "one billion, four hundred four thousand, one hundred".