1161437940 has 288 divisors, whose sum is σ = 4068320256. Its totient is φ = 276203520.

The previous prime is 1161437933. The next prime is 1161437941. The reversal of 1161437940 is 497341611.

1161437940 is a `hidden beast` number, since 1 + 1 + 614 + 37 + 9 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 1161437895 and 1161437904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161437941) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1958284 + ... + 1958876.

It is an arithmetic number, because the mean of its divisors is an integer number (14126112).

Almost surely, 2^1161437940 is an apocalyptic number.

1161437940 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 1161437940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2034160128).

1161437940 is an abundant number, since it is smaller than the sum of its proper divisors (2906882316).

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

1161437940 is a wasteful number, since it uses less digits than its factorization.

1161437940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1161437940 is about 34079.8758800557. The cubic root of 1161437940 is about 1051.1515529371.

The spelling of 1161437940 in words is "one billion, one hundred sixty-one million, four hundred thirty-seven thousand, nine hundred forty".