1405800009 has 8 divisors (see below), whose sum is σ = 2082666720. Its totient is φ = 937199988.

The previous prime is 1405799977. The next prime is 1405800013. The reversal of 1405800009 is 9000085041.

1405800009 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1405800009 - 2⁵ = 1405799977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 52066667 = 1405800009 / (1 + 4 + 0 + 5 + 8 + 0 + 0 + 0 + 0 + 9).

It is not an unprimeable number, because it can be changed into a prime (1405800029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26033307 + ... + 26033360.

It is an arithmetic number, because the mean of its divisors is an integer number (260333340).

Almost surely, 2^1405800009 is an apocalyptic number.

It is an amenable number.

1405800009 is a deficient number, since it is larger than the sum of its proper divisors (676866711).

1405800009 is an equidigital number, since it uses as much as digits as its factorization.

1405800009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52066676 (or 52066670 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1405800009 is about 37493.9996399424. Note that the first 3 decimals coincide. The cubic root of 1405800009 is about 1120.2316721539.

Adding to 1405800009 its sum of digits (27), we get a square (1405800036 = 37494²).

The spelling of 1405800009 in words is "one billion, four hundred five million, eight hundred thousand, nine".