10400505 has 16 divisors (see below), whose sum is σ = 17517120. Its totient is φ = 5254848.

The previous prime is 10400501. The next prime is 10400513. The reversal of 10400505 is 50500401.

10400505 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10400505 - 2² = 10400501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (10400501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17962 + ... + 18531.

It is an arithmetic number, because the mean of its divisors is an integer number (1094820).

Almost surely, 2^10400505 is an apocalyptic number.

10400505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10400505 is a deficient number, since it is larger than the sum of its proper divisors (7116615).

10400505 is a wasteful number, since it uses less digits than its factorization.

10400505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36520.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 10400505 is about 3224.9813952952. The cubic root of 10400505 is about 218.2821095897.

Adding to 10400505 its reverse (50500401), we get a palindrome (60900906).

The spelling of 10400505 in words is "ten million, four hundred thousand, five hundred five".