1011083640 has 192 divisors, whose sum is σ = 3545609760. Its totient is φ = 229985280.

The previous prime is 1011083627. The next prime is 1011083641. The reversal of 1011083640 is 463801101.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1011083640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011083641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2193010 + ... + 2193470.

Almost surely, 2^1011083640 is an apocalyptic number.

1011083640 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 1011083640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1772804880).

1011083640 is an abundant number, since it is smaller than the sum of its proper divisors (2534526120).

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

1011083640 is a wasteful number, since it uses less digits than its factorization.

1011083640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1011083640 is about 31797.5414143924. The cubic root of 1011083640 is about 1003.6809804245.

Adding to 1011083640 its reverse (463801101), we get a palindrome (1474884741).

The spelling of 1011083640 in words is "one billion, eleven million, eighty-three thousand, six hundred forty".