13400025444 has 36 divisors (see below), whose sum is σ = 36477848316. Its totient is φ = 4123084608.

The previous prime is 13400025439. The next prime is 13400025491. The reversal of 13400025444 is 44452000431.

It is a happy number.

13400025444 is a `hidden beast` number, since 1 + 3 + 400 + 0 + 254 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2435422500 + 10964602944 = 49350^2 + 104712^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14315799 + ... + 14316734.

Almost surely, 2^13400025444 is an apocalyptic number.

It is an amenable number.

13400025444 is an abundant number, since it is smaller than the sum of its proper divisors (23077822872).

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

13400025444 is a wasteful number, since it uses less digits than its factorization.

13400025444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28632556 (or 28632551 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 13400025444 its reverse (44452000431), we get a palindrome (57852025875).

The spelling of 13400025444 in words is "thirteen billion, four hundred million, twenty-five thousand, four hundred forty-four".