1131620380 has 24 divisors (see below), whose sum is σ = 2592439920. Its totient is φ = 411498240.

The previous prime is 1131620353. The next prime is 1131620381. The reversal of 1131620380 is 830261311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131620381) 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 7 ways as a sum of consecutive naturals, for example, 2571645 + ... + 2572084.

It is an arithmetic number, because the mean of its divisors is an integer number (108018330).

Almost surely, 2^1131620380 is an apocalyptic number.

1131620380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131620380 is an abundant number, since it is smaller than the sum of its proper divisors (1460819540).

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

1131620380 is a wasteful number, since it uses less digits than its factorization.

1131620380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143749 (or 5143747 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1131620380 is about 33639.5656927969. The cubic root of 1131620380 is about 1042.0780626822.

Adding to 1131620380 its reverse (830261311), we get a palindrome (1961881691).

The spelling of 1131620380 in words is "one billion, one hundred thirty-one million, six hundred twenty thousand, three hundred eighty".