244040002405 has 4 divisors (see below), whose sum is σ = 292848002892. Its totient is φ = 195232001920.

The previous prime is 244040002373. The next prime is 244040002477. The reversal of 244040002405 is 504200040442.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108816855876 + 135223146529 = 329874^2 + 367727^2 .

It is not a de Polignac number, because 244040002405 - 2⁵ = 244040002373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 244040002405.

It is a congruent 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, 24404000236 + ... + 24404000245.

It is an arithmetic number, because the mean of its divisors is an integer number (73212000723).

Almost surely, 2^244040002405 is an apocalyptic number.

It is an amenable number.

244040002405 is a deficient number, since it is larger than the sum of its proper divisors (48808000487).

244040002405 is an equidigital number, since it uses as much as digits as its factorization.

244040002405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48808000486.

The product of its (nonzero) digits is 5120, while the sum is 25.

Adding to 244040002405 its reverse (504200040442), we get a palindrome (748240042847).

The spelling of 244040002405 in words is "two hundred forty-four billion, forty million, two thousand, four hundred five".