100404080 has 80 divisors (see below), whose sum is σ = 273357504. Its totient is φ = 33576960.

The previous prime is 100404049. The next prime is 100404107. The reversal of 100404080 is 80404001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20774 + ... + 25146.

Almost surely, 2^100404080 is an apocalyptic number.

100404080 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 100404080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136678752).

100404080 is an abundant number, since it is smaller than the sum of its proper divisors (172953424).

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

100404080 is a wasteful number, since it uses less digits than its factorization.

100404080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4434 (or 4428 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 100404080 is about 10020.1836310519. The cubic root of 100404080 is about 464.7832342279.

Adding to 100404080 its reverse (80404001), we get a palindrome (180808081).

The spelling of 100404080 in words is "one hundred million, four hundred four thousand, eighty".