11428488644 has 48 divisors (see below), whose sum is σ = 20866191360. Its totient is φ = 5471003520.

The previous prime is 11428488641. The next prime is 11428488649. The reversal of 11428488644 is 44688482411.

It is a super-2 number, since 2×11428488644² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11428488592 and 11428488601.

It is not an unprimeable number, because it can be changed into a prime (11428488641) 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, 4782602 + ... + 4784990.

It is an arithmetic number, because the mean of its divisors is an integer number (434712320).

Almost surely, 2^11428488644 is an apocalyptic number.

It is an amenable number.

11428488644 is a deficient number, since it is larger than the sum of its proper divisors (9437702716).

11428488644 is a wasteful number, since it uses less digits than its factorization.

11428488644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820 (or 2818 counting only the distinct ones).

The product of its digits is 1572864, while the sum is 50.

The spelling of 11428488644 in words is "eleven billion, four hundred twenty-eight million, four hundred eighty-eight thousand, six hundred forty-four".