1011235540 has 72 divisors (see below), whose sum is σ = 2475779040. Its totient is φ = 345941568.

The previous prime is 1011235517. The next prime is 1011235541. The reversal of 1011235540 is 455321101.

It is a happy number.

1011235540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011235541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 605787 + ... + 607453.

It is an arithmetic number, because the mean of its divisors is an integer number (34385820).

Almost surely, 2^1011235540 is an apocalyptic number.

1011235540 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 1011235540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1237889520).

1011235540 is an abundant number, since it is smaller than the sum of its proper divisors (1464543500).

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

1011235540 is a wasteful number, since it uses less digits than its factorization.

1011235540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309 (or 2300 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1011235540 is about 31799.9298741365. The cubic root of 1011235540 is about 1003.7312405285.

Adding to 1011235540 its reverse (455321101), we get a palindrome (1466556641).

The spelling of 1011235540 in words is "one billion, eleven million, two hundred thirty-five thousand, five hundred forty".