2040400145 has 16 divisors (see below), whose sum is σ = 2802428928. Its totient is φ = 1397048640.

The previous prime is 2040400099. The next prime is 2040400147. The reversal of 2040400145 is 5410040402.

It is not a de Polignac number, because 2040400145 - 2²² = 2036205841 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2040400147) 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, 19361 + ... + 66750.

It is an arithmetic number, because the mean of its divisors is an integer number (175151808).

Almost surely, 2^2040400145 is an apocalyptic number.

It is an amenable number.

2040400145 is a deficient number, since it is larger than the sum of its proper divisors (762028783).

2040400145 is an equidigital number, since it uses as much as digits as its factorization.

2040400145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86800.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 2040400145 is about 45170.7886249510. The cubic root of 2040400145 is about 1268.3480588511.

Adding to 2040400145 its reverse (5410040402), we get a palindrome (7450440547).

The spelling of 2040400145 in words is "two billion, forty million, four hundred thousand, one hundred forty-five".