100405664 has 24 divisors (see below), whose sum is σ = 200628288. Its totient is φ = 49452480.

The previous prime is 100405651. The next prime is 100405673. The reversal of 100405664 is 466504001.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21272 + ... + 25559.

It is an arithmetic number, because the mean of its divisors is an integer number (8359512).

Almost surely, 2^100405664 is an apocalyptic number.

It is an amenable number.

100405664 is a deficient number, since it is larger than the sum of its proper divisors (100222624).

100405664 is an equidigital number, since it uses as much as digits as its factorization.

100405664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46908 (or 46900 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 100405664 is about 10020.2626712078. The cubic root of 100405664 is about 464.7856783941.

Adding to 100405664 its reverse (466504001), we get a palindrome (566909665).

The spelling of 100405664 in words is "one hundred million, four hundred five thousand, six hundred sixty-four".