1101320440 has 32 divisors (see below), whose sum is σ = 2703242160. Its totient is φ = 400480000.

The previous prime is 1101320399. The next prime is 1101320447. The reversal of 1101320440 is 440231011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101320447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1251061 + ... + 1251940.

Almost surely, 2^1101320440 is an apocalyptic number.

1101320440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101320440 is an abundant number, since it is smaller than the sum of its proper divisors (1601921720).

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

1101320440 is a wasteful number, since it uses less digits than its factorization.

1101320440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503023 (or 2503019 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1101320440 is about 33186.1483152233. The cubic root of 1101320440 is about 1032.6929999751.

Adding to 1101320440 its reverse (440231011), we get a palindrome (1541551451).

The spelling of 1101320440 in words is "one billion, one hundred one million, three hundred twenty thousand, four hundred forty".