1011320540 has 12 divisors (see below), whose sum is σ = 2123773176. Its totient is φ = 404528208.

The previous prime is 1011320539. The next prime is 1011320549. The reversal of 1011320540 is 450231101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011320549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25282994 + ... + 25283033.

It is an arithmetic number, because the mean of its divisors is an integer number (176981098).

Almost surely, 2^1011320540 is an apocalyptic number.

1011320540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011320540 is an abundant number, since it is smaller than the sum of its proper divisors (1112452636).

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

1011320540 is a wasteful number, since it uses less digits than its factorization.

1011320540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50566036 (or 50566034 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1011320540 is about 31801.2663269877. The cubic root of 1011320540 is about 1003.7593628144.

Adding to 1011320540 its reverse (450231101), we get a palindrome (1461551641).

The spelling of 1011320540 in words is "one billion, eleven million, three hundred twenty thousand, five hundred forty".