1105031640 has 128 divisors (see below), whose sum is σ = 3584160000. Its totient is φ = 271600128.

The previous prime is 1105031639. The next prime is 1105031647. The reversal of 1105031640 is 461305011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105031647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77811 + ... + 90909.

It is an arithmetic number, because the mean of its divisors is an integer number (28001250).

Almost surely, 2^1105031640 is an apocalyptic number.

1105031640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1105031640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1792080000).

1105031640 is an abundant number, since it is smaller than the sum of its proper divisors (2479128360).

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

1105031640 is a wasteful number, since it uses less digits than its factorization.

1105031640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13169 (or 13165 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1105031640 is about 33242.0161843412. The cubic root of 1105031640 is about 1033.8516798181.

Adding to 1105031640 its reverse (461305011), we get a palindrome (1566336651).

The spelling of 1105031640 in words is "one billion, one hundred five million, thirty-one thousand, six hundred forty".