1111648640 has 32 divisors (see below), whose sum is σ = 2657536560. Its totient is φ = 444659200.

The previous prime is 1111648639. The next prime is 1111648651. The reversal of 1111648640 is 468461111.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1111648597 and 1111648606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867836 + ... + 869115.

Almost surely, 2^1111648640 is an apocalyptic number.

1111648640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111648640 is an abundant number, since it is smaller than the sum of its proper divisors (1545887920).

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

1111648640 is an equidigital number, since it uses as much as digits as its factorization.

1111648640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736970 (or 1736958 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1111648640 is about 33341.3952917391. The cubic root of 1111648640 is about 1035.9111644483.

The spelling of 1111648640 in words is "one billion, one hundred eleven million, six hundred forty-eight thousand, six hundred forty".