11439644394 has 32 divisors (see below), whose sum is σ = 23467783680. Its totient is φ = 3716280000.

The previous prime is 11439644357. The next prime is 11439644399. The reversal of 11439644394 is 49344693411.

It is a super-2 number, since 2×11439644394² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11439644399) 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, 103482 + ... + 183269.

It is an arithmetic number, because the mean of its divisors is an integer number (733368240).

Almost surely, 2^11439644394 is an apocalyptic number.

11439644394 is an abundant number, since it is smaller than the sum of its proper divisors (12028139286).

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

11439644394 is a wasteful number, since it uses less digits than its factorization.

11439644394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286926.

The product of its digits is 1119744, while the sum is 48.

The spelling of 11439644394 in words is "eleven billion, four hundred thirty-nine million, six hundred forty-four thousand, three hundred ninety-four".