2040400164 has 24 divisors (see below), whose sum is σ = 5193746208. Its totient is φ = 618303040.

The previous prime is 2040400157. The next prime is 2040400171. The reversal of 2040400164 is 4610040402.

It is an interprime number because it is at equal distance from previous prime (2040400157) and next prime (2040400171).

It is a self number, because there is not a number n which added to its sum of digits gives 2040400164.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7728657 + ... + 7728920.

It is an arithmetic number, because the mean of its divisors is an integer number (216406092).

Almost surely, 2^2040400164 is an apocalyptic number.

It is an amenable number.

2040400164 is an abundant number, since it is smaller than the sum of its proper divisors (3153346044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2040400164 is a wasteful number, since it uses less digits than its factorization.

2040400164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15457595 (or 15457593 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2040400164 is about 45170.7888352639. The cubic root of 2040400164 is about 1268.3480627880.

Adding to 2040400164 its reverse (4610040402), we get a palindrome (6650440566).

It can be divided in two parts, 2040 and 400164, that added together give a palindrome (402204).

The spelling of 2040400164 in words is "two billion, forty million, four hundred thousand, one hundred sixty-four".