1011133780 has 24 divisors (see below), whose sum is σ = 2180771208. Its totient is φ = 393522048.

The previous prime is 1011133763. The next prime is 1011133793. The reversal of 1011133780 is 873311101.

It can be written as a sum of positive squares in 4 ways, for example, as 442597444 + 568536336 = 21038^2 + 23844^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682459 + ... + 683938.

It is an arithmetic number, because the mean of its divisors is an integer number (90865467).

Almost surely, 2^1011133780 is an apocalyptic number.

1011133780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011133780 is an abundant number, since it is smaller than the sum of its proper divisors (1169637428).

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

1011133780 is a wasteful number, since it uses less digits than its factorization.

1011133780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366443 (or 1366441 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 1011133780 is about 31798.3298303543. The cubic root of 1011133780 is about 1003.6975711167.

Adding to 1011133780 its reverse (873311101), we get a palindrome (1884444881).

The spelling of 1011133780 in words is "one billion, eleven million, one hundred thirty-three thousand, seven hundred eighty".