1011500440 has 64 divisors (see below), whose sum is σ = 2387309760. Its totient is φ = 384975360.

The previous prime is 1011500431. The next prime is 1011500447. The reversal of 1011500440 is 440051101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011500447) 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 15 ways as a sum of consecutive naturals, for example, 178450 + ... + 184030.

It is an arithmetic number, because the mean of its divisors is an integer number (37301715).

Almost surely, 2^1011500440 is an apocalyptic number.

1011500440 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 1011500440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1193654880).

1011500440 is an abundant number, since it is smaller than the sum of its proper divisors (1375809320).

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

1011500440 is a wasteful number, since it uses less digits than its factorization.

1011500440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5812 (or 5808 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1011500440 is about 31804.0947049275. The cubic root of 1011500440 is about 1003.8188776092.

Adding to 1011500440 its reverse (440051101), we get a palindrome (1451551541).

The spelling of 1011500440 in words is "one billion, eleven million, five hundred thousand, four hundred forty".